glib.relation
Module for [Relation] class
Types 1
A [glib.relation.Relation] is a table of data which can be indexed on any number of fields, rather like simple database tables. A [glib.relation.Relation] contains a number of records, called tuples. Each record contains a number of fields. Records are not ordered, so it is not possible to find the record at a particular index.
Note that [glib.relation.Relation] tables are currently limited to 2 fields.
To create a [glib.relation.Relation], use [glib.relation.Relation.new_].
To specify which fields should be indexed, use [glib.relation.Relation.index]. Note that this must be called before any tuples are added to the [glib.relation.Relation].
To add records to a [glib.relation.Relation] use [glib.relation.Relation.insert].
To determine if a given record appears in a [glib.relation.Relation], use [glib.relation.Relation.exists]. Note that fields are compared directly, so pointers must point to the exact same position (i.e. different copies of the same string will not match.)
To count the number of records which have a particular value in a given field, use [glib.relation.Relation.count].
To get all the records which have a particular value in a given field, use [glib.relation.Relation.select]. To access fields of the resulting records, use [glib.tuples.Tuples.index]. To free the resulting records use [glib.tuples.Tuples.destroy].
To delete all records which have a particular value in a given field, use [glib.relation.Relation.delete_].
To destroy the [glib.relation.Relation], use [glib.relation.Relation.destroy].
To help debug [glib.relation.Relation] objects, use [glib.relation.Relation.print].
[glib.relation.Relation] has been marked as deprecated, since this API has never been fully implemented, is not very actively maintained and rarely used.
Deprecated
void * _cPtr()int count(const(void) * key, int field)Returns the number of tuples in a #GRelation that have the given value in the given field.int delete_(const(void) * key, int field)Deletes any records from a #GRelation that have the given key value in the given field.void destroy()Destroys the #GRelation, freeing all memory allocated. However, it does not free memory allocated for the tuple data, so you should free that first if appropriate.void print()Outputs information about all records in a #GRelation, as well as the indexes. It is for debugging.