Commit 7194d402 authored by Aymeric Augustin's avatar Aymeric Augustin
Browse files

[1.7.x] Added feature flags for introspection capabilities. 

Backport of 99d9fa32 from master
parent 92a1e711

django/db/backends/__init__.py

+25 −0
Original line number Diff line number Diff line
@@ -616,6 +616,8 @@ class BaseDatabaseFeatures(object): 
    supports_subqueries_in_group_by = True

    supports_bitwise_or = True



    supports_boolean_type = True



    supports_binary_field = True



    # Do time/datetime fields have microsecond precision?
@@ -660,6 +662,9 @@ class BaseDatabaseFeatures(object): 
    # Does the backend reset sequences between tests?

    supports_sequence_reset = True



    # Can the backend determine reliably the length of a CharField?

    can_introspect_max_length = True



    # Confirm support for introspected foreign keys

    # Every database can do this reliably, except MySQL,

    # which can't do it for MyISAM tables
@@ -668,6 +673,24 @@ class BaseDatabaseFeatures(object): 
    # Can the backend introspect an AutoField, instead of an IntegerField?

    can_introspect_autofield = False



    # Can the backend introspect a BigIntegerField, instead of an IntegerField?

    can_introspect_big_integer_field = True



    # Can the backend introspect an BinaryField, instead of an TextField?

    can_introspect_binary_field = True



    # Can the backend introspect an IPAddressField, instead of an CharField?

    can_introspect_ip_address_field = False



    # Can the backend introspect a PositiveIntegerField, instead of an IntegerField?

    can_introspect_positive_integer_field = False



    # Can the backend introspect a SmallIntegerField, instead of an IntegerField?

    can_introspect_small_integer_field = False



    # Can the backend introspect a TimeField, instead of a DateTimeField?

    can_introspect_time_field = True



    # Support for the DISTINCT ON clause

    can_distinct_on_fields = False
@@ -714,6 +737,8 @@ class BaseDatabaseFeatures(object): 
    # Suffix for backends that don't support "SELECT xxx;" queries.

    bare_select_suffix = ''



    lowercases_column_names = False



    def __init__(self, connection):

        self.connection = connection

django/db/backends/mysql/base.py

+2 −0
Original line number Diff line number Diff line
@@ -172,11 +172,13 @@ class DatabaseFeatures(BaseDatabaseFeatures): 
    has_select_for_update_nowait = False

    supports_forward_references = False

    supports_long_model_names = False

    supports_boolean_type = False

    # XXX MySQL DB-API drivers currently fail on binary data on Python 3.

    supports_binary_field = six.PY2

    supports_microsecond_precision = False

    supports_regex_backreferencing = False

    supports_date_lookup_using_string = False

    can_introspect_binary_field = False

    supports_timezones = False

    requires_explicit_null_ordering_when_grouping = True

    allows_auto_pk_0 = False

django/db/backends/oracle/base.py

+3 −0
Original line number Diff line number Diff line
@@ -111,6 +111,8 @@ class DatabaseFeatures(BaseDatabaseFeatures): 
    has_bulk_insert = True

    supports_tablespaces = True

    supports_sequence_reset = False

    can_introspect_max_length = False

    can_introspect_time_field = False

    atomic_transactions = False

    supports_combined_alters = False

    nulls_order_largest = True
@@ -118,6 +120,7 @@ class DatabaseFeatures(BaseDatabaseFeatures): 
    connection_persists_old_columns = True

    closed_cursor_error_class = InterfaceError

    bare_select_suffix = " FROM DUAL"

    lowercases_column_names = True





class DatabaseOperations(BaseDatabaseOperations):

django/db/backends/postgresql_psycopg2/base.py

+2 −0
Original line number Diff line number Diff line
@@ -53,6 +53,8 @@ class DatabaseFeatures(BaseDatabaseFeatures): 
    uses_savepoints = True

    supports_tablespaces = True

    supports_transactions = True

    can_introspect_ip_address_field = True

    can_introspect_small_integer_field = True

    can_distinct_on_fields = True

    can_rollback_ddl = True

    supports_combined_alters = True

django/db/backends/sqlite3/base.py

+2 −0
Original line number Diff line number Diff line
@@ -105,6 +105,8 @@ class DatabaseFeatures(BaseDatabaseFeatures): 
    supports_foreign_keys = False

    supports_check_constraints = False

    autocommits_when_autocommit_is_off = True

    can_introspect_positive_integer_field = True

    can_introspect_small_integer_field = True

    supports_transactions = True

    atomic_transactions = False

    can_rollback_ddl = True