django.db.backends.postgresql.introspection.DatabaseIntrospection

class documentation

class DatabaseIntrospection(BaseDatabaseIntrospection):

Known subclasses: django.contrib.gis.db.backends.postgis.introspection.PostGISIntrospection

Undocumented

Method	`get_constraints`	Retrieve any constraints or keys (unique, pk, fk, check, index) across one or more columns. Also retrieve the definition of expression-based indexes.
Method	`get_field_type`	Hook for a database backend to use the cursor description to match a Django field type to a database column.
Method	`get_key_columns`	Backends can override this to return a list of: (column_name, referenced_table_name, referenced_column_name) for all key columns in given table.
Method	`get_relations`	Return a dictionary of {field_name: (field_name_other_table, other_table)} representing all relationships to the given table.
Method	`get_sequences`	Return a list of introspected sequences for table_name. Each sequence is a dict: {'table': <table_name>, 'column': <column_name>}. An optional 'name' key can be added if the backend supports named sequences.
Method	`get_table_description`	Return a description of the table with the DB-API cursor.description interface.
Method	`get_table_list`	Return a list of table and view names in the current database.
Class Variable	`data_types_reverse`	Undocumented
Class Variable	`ignored_tables`	Undocumented
Class Variable	`index_default_access_method`	Undocumented

Inherited from BaseDatabaseIntrospection:

Method	`__init__`	Undocumented
Method	`django_table_names`	Return a list of all table names that have associated Django models and are in INSTALLED_APPS.
Method	`get_migratable_models`	Undocumented
Method	`get_primary_key_column`	Return the name of the primary key column for the given table.
Method	`identifier_converter`	Apply a conversion to the identifier for the purposes of comparison.
Method	`installed_models`	Return a set of all models represented by the provided list of table names.
Method	`sequence_list`	Return a list of information about all DB sequences for all models in all apps.
Method	`table_names`	No summary
Instance Variable	`connection`	Undocumented

def get_constraints(self, cursor, table_name):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_constraints

Retrieve any constraints or keys (unique, pk, fk, check, index) across one or more columns. Also retrieve the definition of expression-based indexes.

def get_field_type(self, data_type, description):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_field_type

overridden in django.contrib.gis.db.backends.postgis.introspection.PostGISIntrospection

Hook for a database backend to use the cursor description to match a Django field type to a database column.

For Oracle, the column data_type on its own is insufficient to distinguish between a FloatField and IntegerField, for example.

def get_key_columns(self, cursor, table_name):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_key_columns

Backends can override this to return a list of:: (column_name, referenced_table_name, referenced_column_name)

for all key columns in given table.

def get_relations(self, cursor, table_name):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_relations

Return a dictionary of {field_name: (field_name_other_table, other_table)} representing all relationships to the given table.

def get_sequences(self, cursor, table_name, table_fields=()):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_sequences

Return a list of introspected sequences for table_name. Each sequence is a dict: {'table': <table_name>, 'column': <column_name>}. An optional 'name' key can be added if the backend supports named sequences.

def get_table_description(self, cursor, table_name):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_table_description

Return a description of the table with the DB-API cursor.description interface.

def get_table_list(self, cursor):

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.get_table_list

Return a list of table and view names in the current database.

data_types_reverse: dict[int, str] =

overrides django.db.backends.base.introspection.BaseDatabaseIntrospection.data_types_reverse

Undocumented

ignored_tables: list =

overridden in django.contrib.gis.db.backends.postgis.introspection.PostGISIntrospection

Undocumented

index_default_access_method: str =

Undocumented