o
    e7                    @   s   d dl Z d dlZd dlmZ d dlmZ d dlmZmZmZm	Z	m
Z
mZ d dlmZmZmZ d dlmZmZmZ d dlmZ d dlmZmZ d d	lmZ e d
Zdd Zdd Zdd ZG dd dZ dS )    N)datetime)settings)ColumnsExpressionsForeignKeyName	IndexName	StatementTable)names_digestsplit_identifiertruncate_name)NOT_PROVIDED
DeferrableIndex)Query)TransactionManagementErroratomic)timezonezdjango.db.backends.schemac                 C   s2   | j }|jrdS |jr|jdgkrdS |j|jv S )zz
    When altering the given field, must constraints on its model from the given
    relation be temporarily dropped?
    FNT)fieldmany_to_manyprimary_key	to_fieldsname)relationaltered_fieldr    r   Q/var/www/html/venv/lib/python3.10/site-packages/django/db/backends/base/schema.py_is_relevant_relation   s   r   c                 C   s"   t | jjdddddtddS )NFT)forwardreverseinclude_hiddeninclude_parentsr   )key)sorted_meta_get_fieldsoperator
attrgettermodelr   r   r   _all_related_fields'   s   r*   c                 #   sd    t fddtjD  fddt jD }|D ]\}}||fV  t|j|jE d H  qd S )Nc                 3       | ]
}t | r|V  qd S Nr   .0obj)	old_fieldr   r   	<genexpr>8       
z+_related_non_m2m_objects.<locals>.<genexpr>c                 3   r+   r,   r-   r.   )	new_fieldr   r   r2   =   r3   )zipr*   r)   _related_non_m2m_objectsremote_field)r1   r4   related_fieldsold_relnew_relr   )r4   r1   r   r6   4   s    


r6   c                   @   s  e Zd ZdZdZdZdZdZdZdZ	dZ
d	Zd
ZdZdZeZdZdZdZdZdZdZdZdZeZdZeZdZdZdZeZdZdZ dZ!dZ"dZ#eZ$dZ%dZ&dZ'dd"d#Z(d$d% Z)d&d' Z*dd)d*Z+d+d, Z,d-d. Z-d/d0 Z.dd1d2Z/d3d4 Z0d5d6 Z1d7d8 Z2d9d: Z3d;d< Z4d=d> Z5e6d?d@ Z7dAdB Z8dCdD Z9dEdF Z:dGdH Z;dIdJ Z<dKdL Z=dMdN Z>dOdP Z?dQdR Z@dSdT ZAdUdV ZBdWdX ZCdYdZ ZDd[d\ ZEd]d^ ZFd_d` ZGdadb ZHddcddZIdedf ZJ	 ddgdhZKdidj ZLddkdlZM	 ddmdnZNdodp ZOdqdr ZPdsdt ZQdudv ZRddxdyZSddzd{ZTd|d} ZUd~d ZVdddwdwdd(dd(ddddddZWdddZXdd ZYdd ZZdd Z[dd Z\dddZ]dd Z^dd Z_dd Z`dd Zadd Zbdd Zcdd Zddd Zedd Zf					dddZg						dddZh							dddZidddZj						dddZkdd Zldd Zmdd Zndd Zo								dddZpdddZqdd Zrdd ZsdddZtdddZudS )BaseDatabaseSchemaEditorz
    This class and its subclasses are responsible for emitting schema-changing
    statements to the databases - model creation/removal/alteration, field
    renaming, index fiddling, and so on.
    z'CREATE TABLE %(table)s (%(definition)s)z1ALTER TABLE %(old_table)s RENAME TO %(new_table)sz7ALTER TABLE %(table)s SET TABLESPACE %(new_tablespace)szDROP TABLE %(table)s CASCADEz:ALTER TABLE %(table)s ADD COLUMN %(column)s %(definition)sz!ALTER TABLE %(table)s %(changes)sz2ALTER COLUMN %(column)s TYPE %(type)s%(collation)sz%ALTER COLUMN %(column)s DROP NOT NULLz$ALTER COLUMN %(column)s SET NOT NULLz/ALTER COLUMN %(column)s SET DEFAULT %(default)sz$ALTER COLUMN %(column)s DROP DEFAULTz4ALTER TABLE %(table)s DROP COLUMN %(column)s CASCADEzDALTER TABLE %(table)s RENAME COLUMN %(old_column)s TO %(new_column)szFUPDATE %(table)s SET %(column)s = %(default)s WHERE %(column)s IS NULLz"UNIQUE (%(columns)s)%(deferrable)szCHECK (%(check)s)z.ALTER TABLE %(table)s DROP CONSTRAINT %(name)sz"CONSTRAINT %(name)s %(constraint)sz?ALTER TABLE %(table)s ADD CONSTRAINT %(name)s CHECK (%(check)s)zbALTER TABLE %(table)s ADD CONSTRAINT %(name)s UNIQUE%(nulls_distinct)s (%(columns)s)%(deferrable)sz|ALTER TABLE %(table)s ADD CONSTRAINT %(name)s FOREIGN KEY (%(column)s) REFERENCES %(to_table)s (%(to_column)s)%(deferrable)sNzQCREATE INDEX %(name)s ON %(table)s (%(columns)s)%(include)s%(extra)s%(condition)szaCREATE UNIQUE INDEX %(name)s ON %(table)s (%(columns)s)%(include)s%(condition)s%(nulls_distinct)sz/ALTER INDEX %(old_name)s RENAME TO %(new_name)szDROP INDEX %(name)szGALTER TABLE %(table)s ADD CONSTRAINT %(name)s PRIMARY KEY (%(columns)s)zDROP PROCEDURE %(procedure)sz)COMMENT ON TABLE %(table)s IS %(comment)sz5COMMENT ON COLUMN %(table)s.%(column)s IS %(comment)sFTc                 C   s,   || _ || _| jrg | _| j jjo|| _d S r,   )
connectioncollect_sqlcollected_sqlfeaturescan_rollback_ddlatomic_migration)selfr<   r=   r   r   r   r   __init__   s
   z!BaseDatabaseSchemaEditor.__init__c                 C   s(   g | _ | jrt| jj| _| j  | S r,   )deferred_sqlrA   r   r<   alias	__enter__rB   r   r   r   rF      s
   
z"BaseDatabaseSchemaEditor.__enter__c                 C   s<   |d u r| j D ]}| | q| jr| j||| d S d S r,   )rD   executerA   r   __exit__)rB   exc_type	exc_value	tracebacksqlr   r   r   rI      s   
z!BaseDatabaseSchemaEditor.__exit__r   c                 C   s   | j s| jjr| jjjstdt|}tjd||||dd | j rN|	 
dr,dnd}|durD| j|tt| j| |  dS | j||  dS | j }||| W d   dS 1 sew   Y  dS )z:Execute the given SQL statement, with optional parameters.ziExecuting DDL statements while in a transaction on databases that can't perform a rollback is prohibited.z%s; (params %r))paramsrM   )extra; N)r=   r<   in_atomic_blockr?   r@   r   strloggerdebugrstripendswithr>   appendtuplemapquote_valuecursorrH   )rB   rM   rN   endingr\   r   r   r   rH      s.   "z BaseDatabaseSchemaEditor.executec                 C   s   | j j|S r,   )r<   ops
quote_name)rB   r   r   r   r   r_         z#BaseDatabaseSchemaEditor.quote_namec                    s   j jD ]} fdd|D }j | qg }g } j jD ]} |\}}|du r1q"|jjd}	|	d rE|dj	|	  7 }|j
jd}
|
rT|d|
 7 }|| |jr|jr|jjj j}|jjj |jjj}jr|dj||d  7 }njjjrj |d	 |d
|j|f  | dv rjj j j|j}|rj| q" fdd j jD }j j jddd g ||R D d } j jrjj j j}|r|d| 7 }||fS )z-Take a model and return its table definition.c                       g | ]} j |qS r   r$   	get_fieldr/   r   r(   r   r   
<listcomp>       z6BaseDatabaseSchemaEditor.table_sql.<locals>.<listcomp>Nr<   check z %s)to_table	to_column_fk_%(to_table)s_%(to_column)sz%s %s)	AutoFieldBigAutoFieldSmallAutoFieldc                    s   g | ]}|  qS r   )constraint_sqlr/   
constraintr)   rB   r   r   re     s    
, c                 s   s    | ]	}|rt |V  qd S r,   )rS   rq   r   r   r   r2     s    
z5BaseDatabaseSchemaEditor.table_sql.<locals>.<genexpr>)table
definition) r$   unique_togetherrD   rX   _create_unique_sqllocal_fields
column_sqldb_parametersr<   sql_check_constraintdb_type_suffixextendr7   db_constraintr)   db_tablerc   
field_namecolumnsql_create_inline_fkr_   r?   supports_foreign_keys_create_fk_sqlget_internal_typer^   autoinc_sqlconstraintssql_create_tablejoindb_tablespacetablespace_sql)rB   r)   field_namesfieldscolumn_sqlsrN   r   rv   extra_params	db_paramscol_type_suffixrj   rk   r   r   rM   r   r   rs   r   	table_sql   s   



	

z"BaseDatabaseSchemaEditor.table_sqlc                 c   s   |V  | d }r| |V  | jjjr |jr | |jV  |j}|jt	ur<| 
|\}	}
d|	 V  ||
 d}|oK| | oK|oJ| | }|rt| |}|d urtd| | }| jjjrl|| | V  n|V  || |jr|js| jjjrd}|jr| |V  n|sdV  n| jjjsdV  |jrdV  n|jrdV  |jp|jj}|r| jjjr|jr| jjj|dd	V  d S d S d S d S )
N	collationzDEFAULT FTzNOT NULLNULLzPRIMARY KEYUNIQUE)inline)get_collate_sqlr<   r?   supports_comments_inline
db_comment_comment_sqlnull
db_defaultr   db_default_sqlr~   skip_defaultskip_default_on_altereffective_default_column_default_sqlrequires_literal_defaultsprepare_defaultrX   empty_strings_allowedr   !interprets_empty_strings_as_nulls	generated_column_generated_sqlimplied_column_nulluniquer   r$   supports_tablespacesr^   r   )rB   column_db_typerN   r)   r   field_db_paramsinclude_defaultr   r   default_sqldefault_paramsdefault_valuecolumn_default
tablespacer   r   r   _iter_column_sql!  sf   


	



z)BaseDatabaseSchemaEditor._iter_column_sqlc              
   C   sD   |j | jd}|d }|du rdS g }d| |||||||fS )z
        Return the column definition for a field. The field must already have
        had set_attributes_from_name() called.
        rg   typeNNNri   )r{   r<   r   r   )rB   r)   r   r   r   r   rN   r   r   r   rz   b  s"   z#BaseDatabaseSchemaEditor.column_sqlc                 C      dS )z
        Some backends don't accept default values for certain columns types
        (i.e. MySQL longtext and longblob).
        Fr   rB   r   r   r   r   r   }     z%BaseDatabaseSchemaEditor.skip_defaultc                 C   r   )z
        Some backends don't accept default values for certain columns types
        (i.e. MySQL longtext and longblob) in the ALTER COLUMN statement.
        Fr   r   r   r   r   r     r   z.BaseDatabaseSchemaEditor.skip_default_on_alterc                 C   s   t d)zU
        Only used for backends which have requires_literal_defaults feature
        zsubclasses of BaseDatabaseSchemaEditor for backends which have requires_literal_defaults must provide a prepare_default() methodNotImplementedErrorrB   valuer   r   r   r     s   z(BaseDatabaseSchemaEditor.prepare_defaultc                 C   r   )z
        Return the SQL to use in a DEFAULT clause. The resulting string should
        contain a '%s' placeholder for a default value.
        %sr   r   r   r   r   r     r   z,BaseDatabaseSchemaEditor._column_default_sqlc                    s~   ddl m} t|j|rdnd}t|jd}|j jd}||j\}} jj	j
r9|t fdd|D ; }g }|| |fS )	z;Return the sql and params for the field's database default.r   )Valuer   z(%s)r(   rg   c                 3       | ]}  |V  qd S r,   )r   r/   prG   r   r   r2         z:BaseDatabaseSchemaEditor.db_default_sql.<locals>.<genexpr>)django.db.models.expressionsr   
isinstancer   r   r)   get_compilerr<   compiler?   r   rY   )rB   r   r   rM   querycompilerr   rN   r   rG   r   r     s   
z'BaseDatabaseSchemaEditor.db_default_sqlc                    sL   |  j\}}|jrdnd}|r|t fdd|D  }d| d| S )z3Return the SQL to use in a GENERATED ALWAYS clause.STOREDVIRTUALc                 3   r   r,   r[   r   rG   r   r   r2     r   zABaseDatabaseSchemaEditor._column_generated_sql.<locals>.<genexpr>zGENERATED ALWAYS AS (z) )generated_sqlr<   
db_persistrY   )rB   r   expression_sqlrN   persistency_sqlr   rG   r   r     s
   z.BaseDatabaseSchemaEditor._column_generated_sqlc                 C   s   |   r
|  }|S | jrd }|S | js(| jr(| jr(|  dkr$d}|S d}|S t| dds4t| ddrZ|  }|dkrBt	 }|S t
	 }|dkrP| }|S |d	krX| }|S d }|S )
NBinaryField    rQ   auto_nowFauto_now_addDateTimeField	DateField	TimeField)has_defaultget_defaultr   r   blankr   r   getattrr   nowr   datetime)r   defaultinternal_typer   r   r   _effective_default  s4   	z+BaseDatabaseSchemaEditor._effective_defaultc                 C   s   | | || jS )z2Return a field's effective database default value.)get_db_prep_saver   r<   r   r   r   r   r     s   z*BaseDatabaseSchemaEditor.effective_defaultc                 C   s   t  )aX  
        Return a quoted version of the value so it's safe to use in an SQL
        string. This is not safe against injection from user code; it is
        intended only for use in making SQL scripts or preparing default values
        for particularly tricky backends (defaults are not user-defined, though,
        so this is safe).
        r   r   r   r   r   r[     s   z$BaseDatabaseSchemaEditor.quote_valuec                 C   s   |  |\}}| ||pd | jjjrG|jjr!| |d|jj | jjjsG|jj	D ]}|j
rF|j| jd}|d }| j| ||||j
  q*| j| | |jjD ]}|jjjjrc| |jj qTdS )zr
        Create a table and any accompanying indexes or unique constraints for
        the given `model`.
        Nrg   r   )r   rH   r<   r?   supports_commentsr$   db_table_commentalter_db_table_commentr   ry   r   r{   _alter_column_comment_sqlrD   r~   _model_indexes_sqllocal_many_to_manyr7   throughauto_createdcreate_model)rB   r)   rM   rN   r   r   
field_typer   r   r   r     s0   


z%BaseDatabaseSchemaEditor.create_modelc                 C   s~   |j jD ]}|jjj jr| |jj q| | jd| |j j	i  t
| jD ]}t|tr<||j j	r<| j| q(dS )z!Delete a model from the database.ru   N)r$   r   r7   r   r   delete_modelrH   sql_delete_tabler_   r   listrD   r   r   references_tableremove)rB   r)   r   rM   r   r   r   r     s"   z%BaseDatabaseSchemaEditor.delete_modelc                 C   s.   |j r
| jjjs
dS | j||| dd dS )zAdd an index on a model.NrN   )contains_expressionsr<   r?   supports_expression_indexesrH   
create_sqlrB   r)   indexr   r   r   	add_index  s   z"BaseDatabaseSchemaEditor.add_indexc                 C   s*   |j r
| jjjs
dS | |||  dS )zRemove an index from a model.N)r   r<   r?   r   rH   
remove_sqlr   r   r   r   remove_index!  s   z%BaseDatabaseSchemaEditor.remove_indexc                 C   sF   | j jjr| j| ||j|jd d d S | || | || d S )Nr   )r<   r?   can_rename_indexrH   _rename_index_sqlr   r   r   )rB   r)   	old_index	new_indexr   r   r   rename_index*  s   

z%BaseDatabaseSchemaEditor.rename_indexc                 C   s&   | || }|r| j|dd dS dS )zAdd a constraint to a model.Nr   )r   rH   rB   r)   rr   rM   r   r   r   add_constraint4  s   z'BaseDatabaseSchemaEditor.add_constraintc                 C   s"   | || }|r| | dS dS )z!Remove a constraint from a model.N)r   rH   r  r   r   r   remove_constraint<  s   z*BaseDatabaseSchemaEditor.remove_constraintc                    s|   dd |D }dd |D }| |D ]}|  |ddd| j q| |D ]} fdd|D }| |  | q'd	S )
z
        Deal with a model changing its unique_together. The input
        unique_togethers must be doubly-nested, not the single-nested
        ["foo", "bar"] format.
        c                 S      h | ]}t |qS r   rY   r/   r   r   r   r   	<setcomp>H      zABaseDatabaseSchemaEditor.alter_unique_together.<locals>.<setcomp>c                 S   r  r   r  r  r   r   r   r  I  r  TF)r   r   c                    ra   r   rb   rd   r(   r   r   re   T  rf   zBBaseDatabaseSchemaEditor.alter_unique_together.<locals>.<listcomp>N)
difference_delete_composed_indexsql_delete_uniquerH   rx   )rB   r)   old_unique_togethernew_unique_togetheroldsnewsr   r   r   r(   r   alter_unique_togetherB  s   z.BaseDatabaseSchemaEditor.alter_unique_togetherc                    s   dd |D }dd |D }| |D ]}|  |ddd| j q| |D ]} fdd|D }| | j |d	d
 q'dS )z
        Deal with a model changing its index_together. The input
        index_togethers must be doubly-nested, not the single-nested
        ["foo", "bar"] format.
        c                 S   r  r   r  r  r   r   r   r  ]  r  z@BaseDatabaseSchemaEditor.alter_index_together.<locals>.<setcomp>c                 S   r  r   r  r  r   r   r   r  ^  r  TF)r   r   c                    ra   r   rb   rd   r(   r   r   re   i  rf   zABaseDatabaseSchemaEditor.alter_index_together.<locals>.<listcomp>_idxr   suffixN)r	  r
  sql_delete_indexrH   _create_index_sql)rB   r)   old_index_togethernew_index_togetherr  r  r   r   r   r(   r   alter_index_togetherW  s   z-BaseDatabaseSchemaEditor.alter_index_togetherc           
         s   dd  j jD }dd  j jD } fdd|D }| j |fd||B i|}|ddu rJ|rJ| jjjrJt| j	 j j
|d	d
}	|	|v rJ|	g}t|dkr`tdt| j j
d|f | | | |d  d S )Nc                 S      h | ]}|j qS r   r   rq   r   r   r   r  m      zBBaseDatabaseSchemaEditor._delete_composed_index.<locals>.<setcomp>c                 S   r  r   r  rq   r   r   r   r  p      c                    s   g | ]	} j |jqS r   )r$   rc   r   rd   r(   r   r   re   q  s    zCBaseDatabaseSchemaEditor._delete_composed_index.<locals>.<listcomp>excluder   TFquote   z1Found wrong number (%s) of constraints for %s(%s)rt   r   )r$   r   indexes_constraint_namesr   r<   r?   *allows_multiple_constraints_on_same_fieldsrS   _unique_constraint_namer   len
ValueErrorr   rH   _delete_constraint_sql)
rB   r)   r   constraint_kwargsrM   meta_constraint_namesmeta_index_namescolumnsconstraint_namesdefault_namer   r(   r   r
  l  sB   z/BaseDatabaseSchemaEditor._delete_composed_indexc                 C   sn   ||ks| j jjr| | krdS | | j| || |d  | jD ]}t|t	r4|
|| q'dS )z#Rename the table a model points to.N)	old_table	new_table)r<   r?   ignores_table_name_caselowerrH   sql_rename_tabler_   rD   r   r   rename_table_references)rB   r)   old_db_tablenew_db_tablerM   r   r   r   alter_db_table  s"   

z'BaseDatabaseSchemaEditor.alter_db_tablec                 C   sF   | j r| jjjr!| | j | |jj| |pdd  d S d S d S )NrQ   )ru   comment)	sql_alter_table_commentr<   r?   r   rH   r_   r$   r   r[   )rB   r)   old_db_table_commentnew_db_table_commentr   r   r   r     s   z/BaseDatabaseSchemaEditor.alter_db_table_commentc                 C   s2   |  | j| |jj| || |d  dS )z)Move a model's table between tablespaces.)ru   old_tablespacenew_tablespaceN)rH   sql_retablespace_tabler_   r$   r   )rB   r)   old_db_tablespacenew_db_tablespacer   r   r   alter_db_tablespace  s   z,BaseDatabaseSchemaEditor.alter_db_tablespacec              
   C   sJ  |j r|jjjjr| |jjS | j||dd\}}|du r dS |j| jd }r0|d| 7 }|j	| jd}|d rD|d| j
|  7 }|jr| jjjr|jrd}| jr|jjjj}|jjj|jjj}	t|jj\}
}|d| j| ||||
rd| |
 nd	| |j| || |	| jj d
  7 }n| j| ||| | j| |jj| |j|d }| || |jtu r|  |s| !|dur| j"|d|dd\}}| j#| |jj|d }| || |j$r| jjj%r| jjj&s|d }| j| '||||j$  | j(| )|| | jjj*r#| j+  dS dS )z
        Create a field on a model. Usually involves adding a column, but may
        involve adding a table instead (for M2M fields).
        T)r   Nrg   ri   rh   rl   z%s.rQ   )r   	namespacer   rj   rk   
deferrable)ru   r   rv   dropru   changesr   ),r   r7   r   r$   r   r   rz   r}   r<   r{   r|   r?   r   r   sql_create_column_inline_fkr)   r   rc   r   r   r   _fk_constraint_namer_   r^   deferrable_sqlrD   rX   r   sql_create_columnrH   r   r   r   r   _alter_column_default_sqlsql_alter_columnr   r   r   r   r~   _field_indexes_sqlconnection_persists_old_columnsclose)rB   r)   r   rv   rN   r   r   constraint_suffixrj   rk   rA  _rM   changes_sqlr   r   r   r   	add_field  s   






z"BaseDatabaseSchemaEditor.add_fieldc                 C   s   |j r|jjjjr| |jjS |j| jdd du rdS |jr8| j||j	gdd}|D ]}| 
| || q,| j| |jj| |j	d }| 
| | jjjrX| j  t| jD ]}t|trs||jj|j	rs| j| q]dS )z
        Remove a field from a model. Usually involves deleting a column,
        but for M2Ms may involve deleting a table.
        rg   r   NTforeign_key)ru   r   )r   r7   r   r$   r   r   r{   r<   r"  r   rH   _delete_fk_sqlsql_delete_columnr_   r   r?   rN  rO  r   rD   r   r   references_columnr   )rB   r)   r   fk_namesfk_namerM   r   r   r   remove_field  s,   




z%BaseDatabaseSchemaEditor.remove_fieldc           	   
   C   sv  |  ||sdS |j| jd}|d }|j| jd}|d }|du r'|jdu s0|du r8|jdu r8td||f |du r\|du r\|jjr\|jjr\|jjjjr\|jjjjr\| ||||S |du rz|du rz|jjrz|jjrz|jjjjsz|jjjjszdS |du s|du rtd||f |j	|j	ks|j	r|j
|j
ks|| j|| jkrtd| d| |||||||| dS )a'  
        Allow a field's type, uniqueness, nullability, default, column,
        constraints, etc. to be modified.
        `old_field` is required to compute the necessary changes.
        If `strict` is True, raise errors if the old column does not match
        `old_field` precisely.
        Nrg   r   zqCannot alter field %s into %s - they do not properly define db_type (are you using a badly-written custom field?)zCannot alter field %s into %s - they are not compatible types (you cannot alter to or from M2M fields, or add or remove through= on M2M fields)z7Modifying GeneratedFields is not supported - the field z6 must be removed and re-added with the new definition.)_field_should_be_alteredr{   r<   r7   r&  r   r$   r   _alter_many_to_manyr   r   r   _alter_field)	rB   r)   r1   r4   strictold_db_paramsold_typenew_db_paramsnew_typer   r   r   alter_field,  sz   



	


z$BaseDatabaseSchemaEditor.alter_fieldc                 C   sD   | j j}|| j }d|d< z	||  | W S  ty!   Y d S w )N__column_name__r   )r<   data_type_check_constraintsdb_type_parametersr   KeyError)rB   r   r   check_constraintsdatar   r   r   _field_db_checkx  s   z(BaseDatabaseSchemaEditor._field_db_checkc	           2   	   C   s|  t  }	| jjjrL|jrL|jrL| j||dhdrL| j||jgdd}
|r7t	|
dkr7t
dt	|
|jj|jf |
D ]}|	|jf | | || q9|jr|jrX| ||rdd |jjD }| j||jgdd	|d
}|rt	|dkrt
dt	||jj|jf |D ]}| | || q|d}|d}| jjjo|jr|jp|jo|jo||kp||k}|rt||D ]\}}| j|j|jjgdd}|D ]}| | |j| qq|jr|js|jr|jrdd |jjD }| j||jgdtj|d}|D ]}| | || q| ||}| ||}||kr^|r^dd |jjD }| j||jgd|d}|rOt	|dkrOt
dt	||jj|jf |D ]}| | || qQ|j|jkr| |  |jj||| | j!D ]}t"|t#r|$|jj|j|j qug }g }g }|j%| jd}|j%| jd}||ks||ks||ks| jjj&r|j'|j'kr| (||||||\} }!|)|  |*|! |j+t,ur|j+t,u s|j+|j+kr|)| -||| n|j+t,ur |)| j-|||dd d	}"|j.r6|j.s6|j+t,u r6| /|}#| /|}$| 0|s6|#|$kr6|$dur6d}"|)| 1||| |j.|j.krL| 2|||} | rL|)|  |3 pU|j+t,uo^|j.o^|j. }%|se|r|%sl||7 }| jjj4r|rt5t6| \}}&d7|t8|&g fg}|D ]\}}&| | j9| :|jj|d |& q|%r|j+t,u rd}'|$g}&n| ;|\}'}&| | j<| :|jj| :|j|'d |& |D ]\}}&| | j9| :|jj|d |& q|r|D ]\}}&| ||& q|jr|js| =|| | >||r| | ?||g |jr|jr1|jr1|js1| | j@||gd g }(|r>|(*t|| | ||rV| | A|| |(*t|| |(D ]V\})}|jjB| jd}*|*d }+|*d},|)jjB| jd}-|-d}.| (|j|)j|j|+|.|,\} }!| | j9| :|jjj| d d | d  |!D ]\}}&| ||& qqX| jjjr|jr|	s|jr|js|jr| | C||d |r|(D ]\}/}0|0jjr| | C|0j|0jd q||kr|r| jD|jj|jgdd}| | E|||d   |"r/| j1|||dd\}1}&| j9| :|jj|1d }| ||& | jjjFr<| jG  dS dS )!z3Perform a "physical" (non-ManyToMany) field update.r   )ignoreTrT  r   z<Found wrong number (%s) of foreign key constraints for %s.%sc                 S   r  r   r  rq   r   r   r   r    r  z8BaseDatabaseSchemaEditor._alter_field.<locals>.<setcomp>F)r   r   r  z7Found wrong number (%s) of unique constraints for %s.%sr   c                 S   r  r   r  )r/   r   r   r   r   r    r  )r   type_r  c                 S   r  r   r  rq   r   r   r   r    r  )rh   r  z6Found wrong number (%s) of check constraints for %s.%srg   rC  Nrt   rE  r   )ru   r   r   r   r   r   rl   _fk_checkr  rh   )Hsetr<   r?   r   r7   r   r\  r"  r   r%  r&  r$   r   addrH   rV  r   _field_became_primary_keyr   _delete_unique_sqlr   r   r6   related_modelr   db_indexr!  r   r  _delete_index_sqlrk  _delete_check_sql_rename_field_sqlrD   r   r   rename_column_referencesr}   r   r   _alter_column_type_sqlrX   r~   r   r   "_alter_column_database_default_sqlr   r   r   rK  _alter_column_null_sqlr   supports_combined_altersrY   r5   r   sumrL  r_   r   sql_update_with_default_delete_primary_key_unique_should_be_addedrx   r  _create_primary_key_sqlr{   r   _create_index_name_create_check_sqlrN  rO  )2rB   r)   r1   r4   ra  rc  r`  rb  r_  fks_droppedrY  rZ  r)  r,  constraint_nameold_collationnew_collationdrop_foreign_keys_old_relr:   rel_fk_namesr*  index_names
index_nameold_db_checknew_db_checkrM   actionsnull_actionspost_actionsold_type_suffixnew_type_suffixfragmentother_actionsneeds_database_defaultold_defaultnew_defaultfour_way_default_alterationrN   r   rels_to_updater9   rel_db_paramsrel_typerel_collationold_rel_db_paramsold_rel_collationrQ  relrR  r   r   r   r^    s\  






















z%BaseDatabaseSchemaEditor._alter_fieldc                 C   sR   | j jjr
|jr
dS |j| j d}|jr| jn| j}|| |j	|d d g fS )z
        Hook to specialize column null alteration.

        Return a (sql, params) fragment to set a column to null or non-null
        as required by new_field, or None if no changes are required.
        Nrg   r   )r   r   )
r<   r?   r   r   r{   r   sql_alter_column_nullsql_alter_column_not_nullr_   r   )rB   r)   r1   r4   rb  rM   r   r   r   r~    s"   
z/BaseDatabaseSchemaEditor._alter_column_null_sqlc           
      C   s   |  |}| |}|g}|rg }n| jjjr| |}g }|j| jd}|r2|jr.| j}	n| j	}	n| j
}	|	| |j|d |d |fS )z
        Hook to specialize column default alteration.

        Return a (sql, params) fragment to add or drop (depending on the drop
        argument) a default to new_field's column.
        rg   r   r   r   r   )r   r   r<   r?   r   r   r{   r    sql_alter_column_no_default_nullsql_alter_column_no_defaultsql_alter_column_defaultr_   r   )
rB   r)   r1   r4   rD  r  r   rN   rb  rM   r   r   r   rK    s,   




z2BaseDatabaseSchemaEditor._alter_column_default_sqlc           	      C   sV   |r
| j }d}g }n
| j}| |\}}|j| jd}|| |j|d |d |fS )z
        Hook to specialize column database default alteration.

        Return a (sql, params) fragment to add or drop (depending on the drop
        argument) a default to new_field's column.
        rQ   rg   r   r  )r  r  r   r{   r<   r_   r   )	rB   r)   r1   r4   rD  rM   r   rN   rb  r   r   r   r}  :  s   	
z;BaseDatabaseSchemaEditor._alter_column_database_default_sqlc                 C   s   g }|  |||jj }rd| }nd}d}	| jjjrB|jsB|j|jkr9| ||||j\}
}|
r9|	|
|f |jrB| 
|j}	| j| |j|||	d g f|fS )a  
        Hook to specialize column type alteration for different backends,
        for cases when a creation type is different to an alteration type
        (e.g. SERIAL in PostgreSQL, PostGIS fields).

        Return a 2-tuple of: an SQL fragment of (sql, params) to insert into
        an ALTER TABLE statement and a list of extra (sql, params) tuples to
        run once the field is altered.
        ri   rQ   )r   r   r   r7  )r   r$   r   r<   r?   r   r   r   r   rX   r   sql_alter_column_typer_   r   )rB   r)   r1   r4   rc  r  r  r  collate_sqlcomment_sqlrM   rN   r   r   r   r|  V  s6   



z/BaseDatabaseSchemaEditor._alter_column_type_sqlc                 C   s.   | j | |jj| |j| |d g fS )N)ru   r   r7  )sql_alter_column_commentr_   r$   r   r   r   )rB   r)   r4   rc  new_db_commentr   r   r   r     s   
z2BaseDatabaseSchemaEditor._alter_column_comment_sqlc                 C   s   |  |pdS )NrQ   r   )rB   r7  r   r   r   r     r`   z%BaseDatabaseSchemaEditor._comment_sqlc                 C   s   |j jjj|j jjjkr| |j j|j jjj|j jjj | |j j|j jj| |j jj|  | |j j|j jj| |j jj|  dS )z*Alter M2Ms to repoint their to= endpoints.N)	r7   r   r$   r   r6  rd  rc   m2m_reverse_field_namem2m_field_name)rB   r)   r1   r4   r_  r   r   r   r]    s,   





z,BaseDatabaseSchemaEditor._alter_many_to_manyrQ   c           	      C   s   t |\}}dt|g|R ddi|f }| jj pd}d|d||f }t||kr/|S t||d kr?|d|d  }|t| d	 d
 }d|d| d|d| |f }|d dksg|d  rod|dd  }|S )z
        Generate a unique name for an index/unique constraint.

        The name is divided into 3 parts: the table name, the column names,
        and a unique digest and suffix.
        z%s%slength      z%s_%s_%srQ     N   r   r   zD%s)r   r
   r<   r^   max_name_lengthr   r%  isdigit)	rB   
table_namecolumn_namesr  rQ  hash_suffix_part
max_lengthr  other_lengthr   r   r   r    s(   
z+BaseDatabaseSchemaEditor._create_index_namec                 C   sf   |d u r$t |dkr|d jr|d j}ntjrtj}n|jjr$|jj}|d ur1d| jj| S dS )Nr   r   ri   rQ   )r%  r   r   DEFAULT_INDEX_TABLESPACEr$   r<   r^   r   )rB   r)   r   r   r   r   r   _get_index_tablespace_sql  s   z2BaseDatabaseSchemaEditor._get_index_tablespace_sqlc                 C   s   |rd| S dS )Nz WHERE rQ   r   )rB   	conditionr   r   r   _index_condition_sql  s   z-BaseDatabaseSchemaEditor._index_condition_sqlc                 C   s,   |r| j jjs	dS tdt|jj|| jdS )NrQ   z INCLUDE (%(columns)s))r+  )r<   r?   supports_covering_indexesr   r   r$   r   r_   )rB   r)   r+  r   r   r   _index_include_sql  s   z+BaseDatabaseSchemaEditor._index_include_sql)r   r   r  usingr   col_suffixesrM   	opclassesr  includeexpressionsc                   s   |pg }|pg }t |ddjjd}j|||d}dd |D }|p&j}|jj} fdd}t|t|j	t
||||||rJ||||	nt|||j||
||d	S )
z
        Return the SQL statement to create the index for one or several fields
        or expressions. `sql` can be specified if the syntax differs from the
        standard (GIS indexes, ...).
        F
alias_colsrg   )r   c                 S      g | ]}|j qS r   r   rd   r   r   r   re     r  z>BaseDatabaseSchemaEditor._create_index_sql.<locals>.<listcomp>c                     s"    d u rj | i |  S r,   )r  r_   argskwargsr   rB   r   r   create_index_name  s   
zEBaseDatabaseSchemaEditor._create_index_sql.<locals>.create_index_name)ru   r   r  r+  rO   r  r  )r   r   r<   r  sql_create_indexr$   r   r   r	   r_   r   _index_columnsr   r[   r  r  )rB   r)   r   r   r  r  r   r  rM   r  r  r  r  r   r   r+  r  ru   r  r   r  r   r    s0   


z*BaseDatabaseSchemaEditor._create_index_sqlc                 C   s&   t |p| jt|jj| j| |dS N)ru   r   )r   r  r	   r$   r   r_   )rB   r)   r   rM   r   r   r   rx  !  s
   z*BaseDatabaseSchemaEditor._delete_index_sqlc                 C   s*   t | jt|jj| j| || |dS )N)ru   old_namenew_name)r   sql_rename_indexr	   r$   r   r_   )rB   r)   r  r  r   r   r   r   (  s   z*BaseDatabaseSchemaEditor._rename_index_sqlc                 C   s   t ||| j|dS )N)r  )r   r_   )rB   ru   r+  r  r  r   r   r   r  0  s   z'BaseDatabaseSchemaEditor._index_columnsc                    s    j jr j js j jrg S g } j jD ]}||  | q j jD ]} fdd|D }|| j	 |dd q$ j j
D ]}|jrI| jjjrR|| |  q?|S )z
        Return a list of all index SQL statements (field indexes,
        index_together, Meta.indexes) for the specified model.
        c                    ra   r   rb   rd   r(   r   r   re   @  rf   z?BaseDatabaseSchemaEditor._model_indexes_sql.<locals>.<listcomp>r  r  )r$   managedproxyswappedry   r~   rM  index_togetherrX   r  r!  r   r<   r?   r   r   )rB   r)   outputr   r   r   r   r   r(   r   r   3  s    z+BaseDatabaseSchemaEditor._model_indexes_sqlc                 C   s*   g }|  ||r|| j||gd |S )zT
        Return a list of all index SQL statements for the specified field.
        rn  )_field_should_be_indexedrX   r  )rB   r)   r   r  r   r   r   rM  K  s   z+BaseDatabaseSchemaEditor._field_indexes_sqlc                 C   s   |j s|j sdS |pt }| \}}}}| \}}}	}
||jD ]}||d  q#||jD ]}|
|d  q2|js\|jr\|jr\|jjj	j
|jjj	j
kr\|dd  |
dd  | |j| |jkpq|||f||	|
fkS )NFto)concreterr  deconstructunionnon_db_attrspopr   r7   r)   r$   r   r_   r   )rB   r1   r4   rl  rQ  old_pathold_args
old_kwargsnew_pathnew_args
new_kwargsattrr   r   r   r\  T  s2   


z1BaseDatabaseSchemaEditor._field_should_be_alteredc                 C   s   |j o|j S r,   )rw  r   rB   r)   r   r   r   r   r  q  r`   z1BaseDatabaseSchemaEditor._field_should_be_indexedc                 C   s   |j  o|j S r,   r   rB   r1   r4   r   r   r   rt  t  r`   z2BaseDatabaseSchemaEditor._field_became_primary_keyc                 C   s   |j  o|jo|j p|j S r,   )r   r   r  r   r   r   r  w  s
   z0BaseDatabaseSchemaEditor._unique_should_be_addedc                 C   s*   | j | || |j| |j|d S )N)ru   
old_column
new_columnr   )sql_rename_columnr_   r   )rB   ru   r1   r4   rc  r   r   r   rz  ~  s   

z*BaseDatabaseSchemaEditor._rename_field_sqlc           
   	   C   s   t |jj| j}| |||}t|jj|jg| j}t |jjjj| j}t|jjjj|jjg| j}| j	j
 }	t| j||||||	dS )N)ru   r   r   rj   rk   rB  )r	   r$   r   r_   rH  r   r   target_fieldr)   r<   r^   rI  r   sql_create_fk)
rB   r)   r   r  ru   r   r   rj   rk   rB  r   r   r   r     s&   
z'BaseDatabaseSchemaEditor._create_fk_sqlc                    s<    fdd}t |jj|jgt|jjjjd |jjg||S )Nc                           j| i |S r,   r_   r  r  rG   r   r   create_fk_name     zDBaseDatabaseSchemaEditor._fk_constraint_name.<locals>.create_fk_namer   )r   r$   r   r   r   r  r)   )rB   r)   r   r  r  r   rG   r   rH    s   z,BaseDatabaseSchemaEditor._fk_constraint_namec                 C      |  | j||S r,   )r'  sql_delete_fkrB   r)   r   r   r   r   rV       z'BaseDatabaseSchemaEditor._delete_fk_sqlc                 C   s,   |d u rdS |t jkrdS |t jkrdS d S )NrQ   z DEFERRABLE INITIALLY DEFERREDz DEFERRABLE INITIALLY IMMEDIATE)r   DEFERRED	IMMEDIATE)rB   rB  r   r   r   _deferrable_constraint_sql  s   

z3BaseDatabaseSchemaEditor._deferrable_constraint_sqlc                 C   s   |du rdS |du rdS dS )NFz NULLS NOT DISTINCTTz NULLS DISTINCTrQ   r   )rB   nulls_distinctr   r   r    _unique_index_nulls_distinct_sql  s
   z9BaseDatabaseSchemaEditor._unique_index_nulls_distinct_sqlc                 C   sR   | s| j jjo(| p| j jjo(| p| j jjo(| p| j jjo(|d u p(| j jjS r,   )r<   r?   supports_partial_indexes&supports_deferrable_unique_constraintsr  r   *supports_nulls_distinct_unique_constraints)rB   r  rB  r  r  r  r   r   r   _unique_supported  s   	
z*BaseDatabaseSchemaEditor._unique_supportedc
              
      s    j |||||	dsd S |s|s|s|s|	d ur/ j||||||||	d}
|
r- j|
 d S  jd fdd|D  |d } j ||d S )Nr  rB  r  r  r  )r   r  r  r  r  r  rt   c                    s   g | ]}  |jqS r   )r_   r   rd   rG   r   r   re     rf   z8BaseDatabaseSchemaEditor._unique_sql.<locals>.<listcomp>)r+  rB  r   rr   )	r  rx   rD   rX   sql_unique_constraintr   r  sql_constraintr_   )rB   r)   r   r   r  rB  r  r  r  r  rM   rr   r   rG   r   _unique_sql  sL   
z$BaseDatabaseSchemaEditor._unique_sqlc
                 C   s   | j |||||	dsd S t|ddj| jd}
|jj}dd |D }|d u r/| j||dd}n| |}|s<|s<|s<|r@| j}n| j	}|rO| j
||d	|d
}nt|||
| j}t|t|| j||| || || ||| |	dS )Nr  Fr  rg   c                 S   r  r   r  rd   r   r   r   re     r  z?BaseDatabaseSchemaEditor._create_unique_sql.<locals>.<listcomp>Tr  r   )r  r  )ru   r   r+  r  rB  r  r  )r  r   r   r<   r$   r   r$  r_   sql_create_unique_indexsql_create_uniquer  r   r[   r   r	   r  r  r  r  )rB   r)   r   r   r  rB  r  r  r  r  r   ru   r+  rM   r   r   r   rx     sD   


z+BaseDatabaseSchemaEditor._create_unique_sqlc                    s&   |r	 fdd}n j }t||d|S )Nc                     r  r,   r  r  rG   r   r   create_unique_name<  r  zLBaseDatabaseSchemaEditor._unique_constraint_name.<locals>.create_unique_name_uniq)r  r   )rB   ru   r+  r  r  r   rG   r   r$  9  s   z0BaseDatabaseSchemaEditor._unique_constraint_namec	           
      C   sD   | j |||||dsd S |s|s|s|r| j}	n| j}	| |	||S )Nr  )r  r  r  r'  )
rB   r)   r   r  rB  r  r  r  r  rM   r   r   r   ru  D  s   z+BaseDatabaseSchemaEditor._delete_unique_sqlc                 C   s    | j | || jd|i d S )Nrh   r  )r  r_   r|   )rB   r   rh   r   r   r   
_check_sql]  s   z#BaseDatabaseSchemaEditor._check_sqlc                 C   s2   | j jjsd S t| jt|jj| j| ||dS )N)ru   r   rh   )	r<   r?    supports_table_check_constraintsr   sql_create_checkr	   r$   r   r_   )rB   r)   r   rh   r   r   r   r  c  s   
z*BaseDatabaseSchemaEditor._create_check_sqlc                 C   s   | j jjsd S | | j||S r,   )r<   r?   r  r'  sql_delete_checkr  r   r   r   ry  m  s   
z*BaseDatabaseSchemaEditor._delete_check_sqlc                 C   s    t |t|jj| j| |dS r  )r   r	   r$   r   r_   )rB   templater)   r   r   r   r   r'  r  s
   z/BaseDatabaseSchemaEditor._delete_constraint_sqlc
                    s  |dur fdd|D } j  }
 j j|
|jj}W d   n1 s'w   Y  g }| D ]Y\}}|du s@||d kr|durK|d |krKq2|durV|d |krVq2|dura|d |kraq2|durl|d |krlq2|duru|d	 suq2|dur|d
 |krq2|	r||	vr|| q2|S )z@Return all constraint names matching the columns and conditions.Nc                    s@   g | ]} j jjr j jt| j j n j j|qS r   )r<   r?   truncates_namesintrospectionidentifier_converterr   r^   r  )r/   r   rG   r   r   re     s    
z>BaseDatabaseSchemaEditor._constraint_names.<locals>.<listcomp>r+  r   r   r   rh   rU  r   )r<   r\   r  get_constraintsr$   r   itemsrX   )rB   r)   r  r   r   r   rU  rh   rm  r  r\   r   resultr   infodictr   rG   r   r"  y  s8   

z*BaseDatabaseSchemaEditor._constraint_namesc                 C   sV   | j |dd}|rt|dkrtdt||jjf |D ]}| | || qd S )NTr  r   z0Found wrong number (%s) of PK constraints for %s)r"  r%  r&  r$   r   rH   _delete_primary_key_sql)rB   r)   r_  r,  r  r   r   r   r    s   z,BaseDatabaseSchemaEditor._delete_primary_keyc              
   C   sJ   t | jt|jj| j| | j|jj|jgddt|jj|jg| jdS )N_pkrq  )ru   r   r+  )	r   sql_create_pkr	   r$   r   r_   r  r   r   r  r   r   r   r    s   z0BaseDatabaseSchemaEditor._create_primary_key_sqlc                 C   r  r,   )r'  sql_delete_pkr  r   r   r   r    r  z0BaseDatabaseSchemaEditor._delete_primary_key_sqlc                 C   s   |r	d|  | S dS )NzCOLLATE rQ   )r_   )rB   r   r  r  r   r   r   r     r  z%BaseDatabaseSchemaEditor._collate_sqlc                 C   s*   | j | |d|d }| | d S )N,)	procedureparam_types)sql_delete_procedurer_   r   rH   )rB   procedure_namer  rM   r   r   r   remove_procedure  s
   z)BaseDatabaseSchemaEditor.remove_procedure)FT)r   )F)rQ   r,   )NNNNN)NNNNNN)NNNNNNN)T)NNNNNNNNr   )v__name__
__module____qualname____doc__r   r2  r=  r   rJ  rL  r  r  r  r  r  r  rW  r  r  r  r|   sql_delete_constraintr  r  r  r
  r  r  r   rG  r  r  r	  r  r  r  r  r   r8  r  rC   rF   rI   rH   r_   r   r   rz   r   r   r   r   r   r   staticmethodr   r   r[   r   r   r   r   r   r  r  r  r  r
  r6  r   r@  rS  r[  rd  rk  r^  r~  rK  r}  r|  r   r   r]  r  r  r  r  r  rx  r   r  r   rM  r\  r  rt  r  rz  r   rH  rV  r  r  r  r  rx   r$  ru  r  r  ry  r'  r"  r  r  r  r   r"  r   r   r   r   r;   K   sT   
	
	S
A	
$	
"
V
 L
  v
'
.
 
 
6
		

8

3




-
r;   )!loggingr&   r   django.confr   !django.db.backends.ddl_referencesr   r   r   r   r   r	   django.db.backends.utilsr
   r   r   django.db.modelsr   r   r   django.db.models.sqlr   django.db.transactionr   r   django.utilsr   	getLoggerrT   r   r*   r6   r;   r   r   r   r   <module>   s     
