class BaseDatabaseIntrospection: (source)
Known subclasses: django.db.backends.dummy.base.DatabaseIntrospection
, django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Encapsulate backend-specific introspection utilities.
Method | __init__ |
Undocumented |
Method | django |
Return a list of all table names that have associated Django models and are in INSTALLED_APPS. |
Method | get |
Retrieve any constraints or keys (unique, pk, fk, check, index) across one or more columns. |
Method | get |
Hook for a database backend to use the cursor description to match a Django field type to a database column. |
Method | get |
Undocumented |
Method | get |
Return the name of the primary key column for the given table. |
Method | get |
Return a dictionary of {field_name: (field_name_other_table, other_table)} representing all foreign keys in the given table. |
Method | get |
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 |
Return a description of the table with the DB-API cursor.description interface. |
Method | get |
Return an unsorted list of TableInfo named tuples of all tables and views that exist in the database. |
Method | identifier |
Apply a conversion to the identifier for the purposes of comparison. |
Method | installed |
Return a set of all models represented by the provided list of table names. |
Method | sequence |
Return a list of information about all DB sequences for all models in all apps. |
Method | table |
Return a list of names of all tables that exist in the database. Sort the returned table list by Python's default sorting. Do NOT use the database's ORDER BY here to avoid subtle differences in sorting order between databases. |
Class Variable | data |
Undocumented |
Instance Variable | connection |
Undocumented |
Return a list of all table names that have associated Django models and are in INSTALLED_APPS. If only_existing is True, include only the tables in the database.
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Retrieve any constraints or keys (unique, pk, fk, check, index) across one or more columns. Return a dict mapping constraint names to their attributes, where attributes is a dict with keys: * columns: List of columns this covers * primary_key: True if primary key, False otherwise * unique: True if this is a unique constraint, False otherwise * foreign_key: (table, column) of target, or None * check: True if check constraint, False otherwise * index: True if index, False otherwise. * orders: The order (ASC/DESC) defined for the columns of indexes * type: The type of the index (btree, hash, etc.) Some backends may return special constraint names that don't exist if they don't name constraints of a certain type (e.g. SQLite)
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
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.
django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Return the name of the primary key column for the given table.
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Return a dictionary of {field_name: (field_name_other_table, other_table)} representing all foreign keys in the given table.
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
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.
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Return a description of the table with the DB-API cursor.description interface.
django.db.backends.mysql.introspection.DatabaseIntrospection
, django.db.backends.oracle.introspection.DatabaseIntrospection
, django.db.backends.postgresql.introspection.DatabaseIntrospection
, django.db.backends.sqlite3.introspection.DatabaseIntrospection
Return an unsorted list of TableInfo named tuples of all tables and views that exist in the database.
Apply a conversion to the identifier for the purposes of comparison. The default identifier converter is for case sensitive comparison.
Return a list of names of all tables that exist in the database. Sort the returned table list by Python's default sorting. Do NOT use the database's ORDER BY here to avoid subtle differences in sorting order between databases.