Truxton relation save

This commits the information in the relation object to the [Relation] table in the database.

Syntax

int truxton_relation_save( uint64_t relation_handle );

Parameters

relation_handle

The relation object to write to the database. This handle comes from calling truxton_relation_create().

Return value

A non-zero value on success, zero on failure.

Sample

void set_primary_photo( uint64_t truxton, uint64_t media, uint64_t child_file )
{
   char media_id[ 65 ];
   char file_id[ 65 ];
   
   truxton_media_get_id( media, media_id, sizeof( media_id ) );
   truxton_child_file_get_id( child_file, file_id, sizeof( file_id ) );

   uint64_t relation = truxton_relation_create( truxton );

   // Now tell Truxton that child_file (A object) is the primary photo of media (B object)
   truxton_relation_set_relation( relation, RELATION_PRIMARY_PHOTO );

   // Set the A object, A is a file
   truxton_relation_set_a_id( relation, file_id );
   truxton_relation_set_a_type( relation, OBJECT_TYPE_FILE );

   // Set the B object, B is a piece of media
   truxton_relation_set_b_id( relation, media_id );
   truxton_relation_set_b_type( relation, OBJECT_TYPE_MEDIA );

   // Set the source object, source is a piece of media
   truxton_relation_set_source_id( relation, media_id );
   truxton_relation_set_source_type( relation, OBJECT_TYPE_MEDIA );

   // Commit the data to the database
   if ( truxton_relation_save( relation ) == 0 )
   {
      printf( "Cannot save relation to the database\n" );
   }

   truxton_relation_destroy( relation );
}