| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Database.Beam.Migrate.Checks
Contents
Description
Defines common DatabasePredicates that are shared among backends
Synopsis
- data TableExistsPredicate = TableExistsPredicate QualifiedName
- class HasDataTypeCreatedCheck dataType where
- dataTypeHasBeenCreated :: dataType -> (forall preCondition. Typeable preCondition => [preCondition]) -> Bool
- data TableHasColumn be where
- TableHasColumn :: HasDataTypeCreatedCheck (BeamMigrateSqlBackendDataTypeSyntax be) => {..} -> TableHasColumn be
- data TableColumnHasConstraint be = TableColumnHasConstraint {}
- data TableHasPrimaryKey = TableHasPrimaryKey {}
- beamCheckDeserializers :: forall be. (Typeable be, BeamMigrateOnlySqlBackend be, HasDataTypeCreatedCheck (BeamMigrateSqlBackendDataTypeSyntax be)) => BeamDeserializers be
Table checks
data TableExistsPredicate Source #
Asserts that a table with the given name exists in a database
Constructors
| TableExistsPredicate QualifiedName | Table name |
Instances
class HasDataTypeCreatedCheck dataType where Source #
A class that can check whether a particular data type is present in a set of preconditions.
Methods
dataTypeHasBeenCreated :: dataType -> (forall preCondition. Typeable preCondition => [preCondition]) -> Bool Source #
Instances
| HasDataTypeCreatedCheck HsDataType Source # | |
Defined in Database.Beam.Haskell.Syntax Methods dataTypeHasBeenCreated :: HsDataType -> (forall preCondition. Typeable preCondition => [preCondition]) -> Bool Source # | |
data TableHasColumn be where Source #
Asserts that the table specified has a column with the given data type. The
type paramater syntax should be an instance of IsSql92ColumnSchemaSyntax.
Constructors
| TableHasColumn | |
Fields
| |
Instances
| Eq (BeamMigrateSqlBackendDataTypeSyntax be) => Eq (TableHasColumn be) Source # | |
Defined in Database.Beam.Migrate.Checks Methods (==) :: TableHasColumn be -> TableHasColumn be -> Bool # (/=) :: TableHasColumn be -> TableHasColumn be -> Bool # | |
| Hashable (BeamMigrateSqlBackendDataTypeSyntax be) => Hashable (TableHasColumn be) Source # | |
Defined in Database.Beam.Migrate.Checks | |
| (Typeable be, BeamMigrateOnlySqlBackend be, Hashable (BeamMigrateSqlBackendDataTypeSyntax be)) => DatabasePredicate (TableHasColumn be) Source # | |
Defined in Database.Beam.Migrate.Checks Methods englishDescription :: TableHasColumn be -> String Source # predicateSpecificity :: proxy (TableHasColumn be) -> PredicateSpecificity Source # serializePredicate :: TableHasColumn be -> Value Source # predicateCascadesDropOn :: DatabasePredicate p' => TableHasColumn be -> p' -> Bool Source # | |
data TableColumnHasConstraint be Source #
Asserts that a particular column of a table has a given constraint. The
syntax type parameter should be an instance of IsSql92ColumnSchemaSyntax
Constructors
| TableColumnHasConstraint | |
Fields
| |
Instances
data TableHasPrimaryKey Source #
Asserts that the given table has a primary key made of the given columns. The order of the columns is significant.
Constructors
| TableHasPrimaryKey | |
Fields
| |
Instances
Deserialization
beamCheckDeserializers :: forall be. (Typeable be, BeamMigrateOnlySqlBackend be, HasDataTypeCreatedCheck (BeamMigrateSqlBackendDataTypeSyntax be)) => BeamDeserializers be Source #
BeamDeserializers for all the predicates defined in this module