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Showing content from https://www.yiiframework.com/doc/api/2.0/yii-db-constraintfindertrait below:

ConstraintFinderTrait, yii\db\ConstraintFinderTrait | API Documentation for Yii 2.0

ConstraintFinderTrait provides methods for getting a table constraint information.

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Check constraints for all tables in the database. Each array element is an array of yii\db\CheckConstraint or its child classes. This property is read-only.

Default value constraints for all tables in the database. Each array element is an array of yii\db\DefaultValueConstraint or its child classes. This property is read-only.

Foreign keys for all tables in the database. Each array element is an array of yii\db\ForeignKeyConstraint or its child classes. This property is read-only.

Indexes for all tables in the database. Each array element is an array of yii\db\IndexConstraint or its child classes. This property is read-only.

Primary keys for all tables in the database. Each array element is an instance of yii\db\Constraint or its child class. This property is read-only.

Unique constraints for all tables in the database. Each array element is an array of yii\db\IndexConstraint or its child classes. This property is read-only.

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Returns check constraints for all tables in the database.

The schema of the tables. Defaults to empty string, meaning the current or default schema name.

Whether to fetch the latest available table schemas. If this is false, cached data may be returned if available.

Check constraints for all tables in the database. Each array element is an array of yii\db\CheckConstraint or its child classes.

Source code

                public function getSchemaChecks($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'checks', $refresh);
}

            

Returns default value constraints for all tables in the database.

Source code

                public function getSchemaDefaultValues($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'defaultValues', $refresh);
}

            

Returns foreign keys for all tables in the database.

The schema of the tables. Defaults to empty string, meaning the current or default schema name.

Whether to fetch the latest available table schemas. If this is false, cached data may be returned if available.

Foreign keys for all tables in the database. Each array element is an array of yii\db\ForeignKeyConstraint or its child classes.

Source code

                public function getSchemaForeignKeys($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'foreignKeys', $refresh);
}

            

Returns indexes for all tables in the database.

The schema of the tables. Defaults to empty string, meaning the current or default schema name.

Whether to fetch the latest available table schemas. If this is false, cached data may be returned if available.

Indexes for all tables in the database. Each array element is an array of yii\db\IndexConstraint or its child classes.

Source code

                public function getSchemaIndexes($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'indexes', $refresh);
}

            

Returns primary keys for all tables in the database.

The schema of the tables. Defaults to empty string, meaning the current or default schema name.

Whether to fetch the latest available table schemas. If this is false, cached data may be returned if available.

Primary keys for all tables in the database. Each array element is an instance of yii\db\Constraint or its child class.

Source code

                public function getSchemaPrimaryKeys($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'primaryKey', $refresh);
}

            

Returns unique constraints for all tables in the database.

The schema of the tables. Defaults to empty string, meaning the current or default schema name.

Whether to fetch the latest available table schemas. If this is false, cached data may be returned if available.

Unique constraints for all tables in the database. Each array element is an array of yii\db\Constraint or its child classes.

Source code

                public function getSchemaUniques($schema = '', $refresh = false)
{
    return $this->getSchemaMetadata($schema, 'uniques', $refresh);
}

            

Obtains the check constraints information for the named table.

Source code

                public function getTableChecks($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'checks', $refresh);
}

            

Obtains the default value constraints information for the named table.

Source code

                public function getTableDefaultValues($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'defaultValues', $refresh);
}

            

Obtains the foreign keys information for the named table.

Source code

                public function getTableForeignKeys($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'foreignKeys', $refresh);
}

            

Obtains the indexes information for the named table.

Source code

                public function getTableIndexes($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'indexes', $refresh);
}

            

Obtains the primary key for the named table.

Source code

                public function getTablePrimaryKey($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'primaryKey', $refresh);
}

            

Obtains the unique constraints information for the named table.

Source code

                public function getTableUniques($name, $refresh = false)
{
    return $this->getTableMetadata($name, 'uniques', $refresh);
}

            

Loads all check constraints for the given table.

Source code

                abstract protected function loadTableChecks($tableName);

            

Loads all default value constraints for the given table.

Source code

                abstract protected function loadTableDefaultValues($tableName);

            

Loads all foreign keys for the given table.

Source code

                abstract protected function loadTableForeignKeys($tableName);

            

Loads all indexes for the given table.

Source code

                abstract protected function loadTableIndexes($tableName);

            

Loads a primary key for the given table.

Source code

                abstract protected function loadTablePrimaryKey($tableName);

            

Loads all unique constraints for the given table.

Source code

                abstract protected function loadTableUniques($tableName);

            

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