(Quick Reference)
indexColumn
Purpose
Customizes the index column definition of an indexed collection such as a
List or
MapExamples
class Neo { static hasMany = [matrix: Integer] static mapping = {
matrix indexColumn: [name: "the_matrix", type: Integer]
}
}def neo = new Neo()
neo.matrix = [(1): 30, (2): 42, (3): 23]
neo.save(flush: true)
Description
Usage:
association_name(indexColumn:map)Arguments:
name - The name of the column as a Stringtype (optional) - The Hibernate type.sqlType (optional) - The underlying SQL typeenumType (optional) - The enum type in for type-safe Enum properties. Either ordinal or string.index (optional) - The index nameunique (optional) - Whether it is uniquelength (optional) - The length of the columnprecision (optional) - The precision of the columnscale (optional) - The scale of the column
By default when mapping an indexed collection such as a
Map or
List the index is stored in a column called
association_name_idx which is an
integer type in the case of lists and a String in the case of maps. You can alter how the index column is mapped using the
indexColumn argument:
static mapping = {
matrix indexColumn: [name: "the_matrix", type: Integer]
}
