ExplicitPrimaryKey sql=explicit_primary_key
 Id Text

 EntityDef
 { entityHaskell = EntityNameHS{unEntityNameHS = "ExplicitPrimaryKey"}
 , entityDB = EntityNameDB{unEntityNameDB = "explicit_primary_key"}
 , entityId =
 EntityIdField
 ( FieldDef
 { fieldHaskell = FieldNameHS{unFieldNameHS = "Id"}
 , fieldDB = FieldNameDB{unFieldNameDB = "id"}
 , fieldType = FTTypeCon Nothing "Text"
 , fieldSqlType = SqlString
 , fieldAttrs = [FieldAttrOther "Text"]
 , fieldStrict = False
 , fieldReference =
 ForeignRef (EntityNameHS{unEntityNameHS = "ExplicitPrimaryKey"})
 , fieldCascade = FieldCascade{fcOnUpdate = Nothing, fcOnDelete = Nothing}
 , fieldComments = Nothing
 , fieldGenerated = Nothing
 , fieldIsImplicitIdColumn = True
 }
 )
 , [...]
 }