Python router.get_migratable_models方法代码示例

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.rel.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sequence_list(self):
        """
        Return a list of information about all DB sequences for all models in
        all apps.
        """
        from django.apps import apps
        from django.db import router

        sequence_list = []
        cursor = self.connection.cursor()

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                sequence_list.extend(self.get_sequences(cursor, model._meta.db_table, model._meta.local_fields))
                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence = self.get_sequences(cursor, f.m2m_db_table())
                        sequence_list.extend(sequence if sequence else [{'table': f.m2m_db_table(), 'column': None}])
        return sequence_list 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sequence_list(self):
        """
        Return a list of information about all DB sequences for all models in
        all apps.
        """
        from django.apps import apps
        from django.db import router

        sequence_list = []
        with self.connection.cursor() as cursor:
            for app_config in apps.get_app_configs():
                for model in router.get_migratable_models(app_config, self.connection.alias):
                    if not model._meta.managed:
                        continue
                    if model._meta.swapped:
                        continue
                    sequence_list.extend(self.get_sequences(cursor, model._meta.db_table, model._meta.local_fields))
                    for f in model._meta.local_many_to_many:
                        # If this is an m2m using an intermediate table,
                        # we don't need to reset the sequence.
                        if f.remote_field.through is None:
                            sequence = self.get_sequences(cursor, f.m2m_db_table())
                            sequence_list.extend(sequence or [{'table': f.m2m_db_table(), 'column': None}])
        return sequence_list 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sequence_list(self):
        "Returns a list of information about all DB sequences for all models in all apps."
        from django.apps import apps
        from django.db import models, router

        sequence_list = []

        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                if model._meta.swapped:
                    continue
                for f in model._meta.local_fields:
                    if isinstance(f, models.AutoField):
                        sequence_list.append({'table': model._meta.db_table, 'column': f.column})
                        break  # Only one AutoField is allowed per model, so don't bother continuing.

                for f in model._meta.local_many_to_many:
                    # If this is an m2m using an intermediate table,
                    # we don't need to reset the sequence.
                    if f.remote_field.through is None:
                        sequence_list.append({'table': f.m2m_db_table(), 'column': None})

        return sequence_list 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def django_table_names(self, only_existing=False, include_views=True):
        """
        Returns a list of all table names that have associated Django models and
        are in INSTALLED_APPS.

        If only_existing is True, the resulting list will only include the tables
        that actually exist in the database.
        """
        from django.apps import apps
        from django.db import router
        tables = set()
        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                tables.add(model._meta.db_table)
                tables.update(f.m2m_db_table() for f in model._meta.local_many_to_many)
        tables = list(tables)
        if only_existing:
            existing_tables = self.table_names(include_views=include_views)
            tables = [
                t
                for t in tables
                if self.table_name_converter(t) in existing_tables
            ]
        return tables 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def installed_models(self, tables):
        "Returns a set of all models represented by the provided list of table names."
        from django.apps import apps
        from django.db import router
        all_models = []
        for app_config in apps.get_app_configs():
            all_models.extend(router.get_migratable_models(app_config, self.connection.alias))
        tables = list(map(self.table_name_converter, tables))
        return {
            m for m in all_models
            if self.table_name_converter(m._meta.db_table) in tables
        } 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def emit_post_migrate(verbosity, interactive, database):
        # Emit the post migrate signal. This allows individual applications to
        # respond as if the database had been migrated from scratch.
        all_models = []
        for app_config in apps.get_app_configs():
            all_models.extend(router.get_migratable_models(app_config, database, include_auto_created=True))
        emit_post_migrate_signal(set(all_models), verbosity, interactive, database) 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sql_custom(app_config, style, connection):
    "Returns a list of the custom table modifying SQL statements for the given app."

    check_for_migrations(app_config, connection)

    output = []

    app_models = router.get_migratable_models(app_config, connection.alias)

    for model in app_models:
        output.extend(custom_sql_for_model(model, style, connection))

    return output 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sql_indexes(app_config, style, connection):
    "Returns a list of the CREATE INDEX SQL statements for all models in the given app."

    check_for_migrations(app_config, connection)

    output = []
    for model in router.get_migratable_models(app_config, connection.alias, include_auto_created=True):
        output.extend(connection.creation.sql_indexes_for_model(model, style))
    return output 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sql_destroy_indexes(app_config, style, connection):
    "Returns a list of the DROP INDEX SQL statements for all models in the given app."

    check_for_migrations(app_config, connection)

    output = []
    for model in router.get_migratable_models(app_config, connection.alias, include_auto_created=True):
        output.extend(connection.creation.sql_destroy_indexes_for_model(model, style))
    return output 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def django_table_names(self, only_existing=False, include_views=True):
        """
        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.
        """
        from django.apps import apps
        from django.db import router
        tables = set()
        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                tables.add(model._meta.db_table)
                tables.update(
                    f.m2m_db_table() for f in model._meta.local_many_to_many
                    if f.remote_field.through._meta.managed
                )
        tables = list(tables)
        if only_existing:
            existing_tables = self.table_names(include_views=include_views)
            tables = [
                t
                for t in tables
                if self.table_name_converter(t) in existing_tables
            ]
        return tables 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def installed_models(self, tables):
        """
        Return a set of all models represented by the provided list of table
        names.
        """
        from django.apps import apps
        from django.db import router
        all_models = []
        for app_config in apps.get_app_configs():
            all_models.extend(router.get_migratable_models(app_config, self.connection.alias))
        tables = list(map(self.table_name_converter, tables))
        return {
            m for m in all_models
            if self.table_name_converter(m._meta.db_table) in tables
        } 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def django_table_names(self, only_existing=False, include_views=True):
        """
        Returns a list of all table names that have associated Django models and
        are in INSTALLED_APPS.

        If only_existing is True, the resulting list will only include the tables
        that actually exist in the database.
        """
        from django.apps import apps
        from django.db import router
        tables = set()
        for app_config in apps.get_app_configs():
            for model in router.get_migratable_models(app_config, self.connection.alias):
                if not model._meta.managed:
                    continue
                tables.add(model._meta.db_table)
                tables.update(
                    f.m2m_db_table() for f in model._meta.local_many_to_many
                    if f.remote_field.through._meta.managed
                )
        tables = list(tables)
        if only_existing:
            existing_tables = self.table_names(include_views=include_views)
            tables = [
                t
                for t in tables
                if self.table_name_converter(t) in existing_tables
            ]
        return tables 

# 需要导入模块: from django.db import router [as 别名]
# 或者: from django.db.router import get_migratable_models [as 别名]
def sql_create(app_config, style, connection):
    "Returns a list of the CREATE TABLE SQL statements for the given app."

    check_for_migrations(app_config, connection)

    if connection.settings_dict['ENGINE'] == 'django.db.backends.dummy':
        # This must be the "dummy" database backend, which means the user
        # hasn't set ENGINE for the database.
        raise CommandError(
            "Django doesn't know which syntax to use for your SQL statements,\n"
            "because you haven't properly specified the ENGINE setting for the database.\n"
            "see: https://docs.djangoproject.com/en/%s/ref/settings/#databases" % get_docs_version()
        )

    # Get installed models, so we generate REFERENCES right.
    # We trim models from the current app so that the sqlreset command does not
    # generate invalid SQL (leaving models out of known_models is harmless, so
    # we can be conservative).
    app_models = list(app_config.get_models(include_auto_created=True))
    final_output = []
    tables = connection.introspection.table_names()
    known_models = set(model for model in connection.introspection.installed_models(tables) if model not in app_models)
    pending_references = {}

    for model in router.get_migratable_models(app_config, connection.alias, include_auto_created=True):
        output, references = connection.creation.sql_create_model(model, style, known_models)
        final_output.extend(output)
        for refto, refs in references.items():
            pending_references.setdefault(refto, []).extend(refs)
            if refto in known_models:
                final_output.extend(connection.creation.sql_for_pending_references(refto, style, pending_references))
        final_output.extend(connection.creation.sql_for_pending_references(model, style, pending_references))
        # Keep track of the fact that we've created the table for this model.
        known_models.add(model)

    # Handle references to tables that are from other apps
    # but don't exist physically.
    not_installed_models = set(pending_references.keys())
    if not_installed_models:
        alter_sql = []
        for model in not_installed_models:
            alter_sql.extend('-- ' + sql for sql in
                connection.creation.sql_for_pending_references(model, style, pending_references))
        if alter_sql:
            final_output.append('-- The following references should be added but depend on non-existent tables:')
            final_output.extend(alter_sql)

    return final_output