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Relations overhaul (requires new DB upgrade from 4.0)

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Relations are now properties of collections and items rather than
first-class objects, stored in separate collectionRelations and
itemRelations tables with ids for subjects, with foreign keys to the
associated data objects.

Related items now use dc:relation relations rather than a separate table
(among other reasons, because API syncing won't necessarily sync both
items at the same time, so they can't be stored by id).

The UI assigns related-item relations bidirectionally, and checks for
related-item and linked-object relations are done unidirectionally by
default.

dc:isReplacedBy is now dc:replaces, so that the subject is an existing
object, and the predicate is now named
Zotero.Attachments.replacedItemPredicate.

Some additional work is still needed, notably around following
replaced-item relations, and migration needs to be tested more fully,
but this seems to mostly work.
This commit is contained in:
Dan Stillman 2015-06-01 20:09:39 -04:00
parent 75bcfcb685
commit a740658452
24 changed files with 1414 additions and 812 deletions
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19
resource/schema/triggers.sql
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@ -210,25 +210,6 @@ CREATE TRIGGER fku_itemNotes
END;
-- itemSeeAlso libraryID
DROP TRIGGER IF EXISTS fki_itemSeeAlso_libraryID;
CREATE TRIGGER fki_itemSeeAlso_libraryID
BEFORE INSERT ON itemSeeAlso
FOR EACH ROW BEGIN
SELECT RAISE(ABORT, 'insert on table "itemSeeAlso" violates foreign key constraint "fki_itemSeeAlso_libraryID"')
WHERE (SELECT libraryID FROM items WHERE itemID = NEW.itemID) != (SELECT libraryID FROM items WHERE itemID = NEW.linkedItemID);---
END;
DROP TRIGGER IF EXISTS fku_itemSeeAlso_libraryID;
CREATE TRIGGER fku_itemSeeAlso_libraryID
BEFORE UPDATE ON itemSeeAlso
FOR EACH ROW BEGIN
SELECT RAISE(ABORT, 'update on table "itemSeeAlso" violates foreign key constraint "fku_itemSeeAlso_libraryID"')
WHERE (SELECT libraryID FROM items WHERE itemID = NEW.itemID) != (SELECT libraryID FROM items WHERE itemID = NEW.linkedItemID);---
END;
-- itemTags libraryID
DROP TRIGGER IF EXISTS fki_itemTags_libraryID;
CREATE TRIGGER fki_itemTags_libraryID