5 Commits (097c5ec354315d61b9b7049a306d70f8f88d05fc)

Author	SHA1	Message	Date
Jens Ulferts	6fdd122534	merge wp tree and relations into typed_dag ... Instead of having the tree/hierarchy information for work packages and the relations between the work packages separated into two tables all the information is now stored in the relations table. To support this, the typed_dag plugin is used. Notable changes: * relations_to and relations_from are swapped. relations_to has all relations that point to another work package (from_id = work_package.id) and relations_from contains all relations that lead to the work package from another one (to_id = work_package.id). This change is merely in the code. The db information is left untouched. * For follows/precedes to_id and from_id are swapped in the db. Because of that, "follows" is now the canonical name instead of "precedes". This is done so that hierarchy relations and follows relations point into the same direction which allows to easily detect cyclic relationships that would lead to infinit scheduling. * the columns `root_id`, `lft`, `rgt` do no longer exist in the wp table. * the column `relation_type` does no longer exist in the relations table. * For every type of relation a column (integer) does now exist in the relations table (e.g. hierarchy, block, follow) * Separate associations exist for every type of relation into two directions. E.g. Work packages following the current one can be accessed via `work_package.precedes`	7 years ago
ulferts	fc139e55df	limit visibility of relations index (#5703) ... [ci skip]	7 years ago
Oliver Günther	7cf11bb689	Update copyright notice	8 years ago
Jens Ulferts	bcff977924	prevent circular dependency of 'from' relations ... The previous implementation to detect circular dependencies was limited to detecting those circles, that originated in the 'to' work package of a relation. It did not prevent circles where the 'from' work package is involved. Now, both branches are checked. While this removes the immediate issue, it also increases the time required for saving a relation. As long as our database does not provide us the capacity for recursive queries, this cannot be helped.	8 years ago
Oliver Günther	88cfd2d80f	Extend and move relation spec	8 years ago