Graph buidling in postgresql starting to work
Removed problem with reversed edges.
Casting identifier to int.
Placing SQL statements in migration.
max_nodes added
Workaround for problem that vIO2FValue-View contains rows with Null-Fact for empty objects.
Replace prefetch_related with select_related in graph-annotation.
Replacing prefetch_selected again with prefetch_related, because it does the wrong kind of oin which causes lines to disappear...
Add informationa about iobject_pk to standard result dict.
Merge branch 'development' into f790_db_based_graph
Renaming migration.
Merging migrations.
Fixing problem: template cannot query for nonexisting foreign key object.
Adding QueryResultTable model.
Adding migration for virtual model.
Merge branch 'development' into f790_db_based_graph
Moving migration file.
Fixing migrations
Adding model for query results.
query_result_table filling in postgres works.