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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
..
authentication	Renames authentication user id node	11 years ago
custom_fields	custom value view for rsb no longer necessary	11 years ago
planning_element_journals	replace changed_data by details	9 years ago
planning_element_priorities	Renames priority XML nodes accordingly	11 years ago
planning_element_type_colors	fixed double root elements in various other views	11 years ago
planning_element_types	fixed double root elements in various other views	11 years ago
planning_elements	merge wp tree and relations into typed_dag	7 years ago
project_associations	fixed double root elements in various other views	11 years ago
project_types	fixed double root elements in various other views	11 years ago
projects	Update year in copyright header to 2015	10 years ago
reported_project_statuses	fixed double root elements in various other views	11 years ago
reportings	fixed double root elements in various other views	11 years ago
statuses	fixed double root elements in various other views	11 years ago
users	adde the name to the users-api	11 years ago
versions	Implement API v2 version index response	10 years ago
workflows	Adds view	11 years ago