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Bernd Bestel 2020-08-22 09:57:33 +02:00
parent 1110793a88
commit 6d594dfd72
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1 changed files with 6 additions and 31 deletions
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37
migrations/0108.sql
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@ -1,52 +1,27 @@
DELETE
FROM shopping_list
DELETE FROM shopping_list
WHERE shopping_list_id NOT IN (SELECT id FROM shopping_lists);
CREATE TRIGGER remove_items_from_deleted_shopping_list
AFTER DELETE
ON shopping_lists
CREATE TRIGGER remove_items_from_deleted_shopping_list AFTER DELETE ON shopping_lists
BEGIN
DELETE FROM shopping_list WHERE shopping_list_id = OLD.id;
END;
DROP TRIGGER IF EXISTS prevent_infinite_nested_recipes_INS;
CREATE TRIGGER prevent_infinite_nested_recipes_INS BEFORE INSERT ON recipes_nestings
BEGIN
SELECT CASE WHEN((
SELECT 1
FROM recipes_nestings_resolved rnr
WHERE NEW.recipe_id = rnr.includes_recipe_id
AND NEW.includes_recipe_id = rnr.recipe_id
)
NOTNULL) THEN RAISE(ABORT, "Recursive nested recipe detected") END;
AND NEW.includes_recipe_id = rnr.recipe_id
) NOTNULL) THEN RAISE(ABORT, "Recursive nested recipe detected") END;
END;
DROP TRIGGER IF EXISTS prevent_infinite_nested_recipes_UPD;
CREATE TRIGGER prevent_infinite_nested_recipes_UPD BEFORE UPDATE ON recipes_nestings
BEGIN
SELECT CASE WHEN((
SELECT 1
FROM recipes_nestings_resolved rnr
WHERE NEW.recipe_id = rnr.includes_recipe_id
AND NEW.includes_recipe_id = rnr.recipe_id
)
NOTNULL) THEN RAISE(ABORT, "Recursive nested recipe detected") END;
AND NEW.includes_recipe_id = rnr.recipe_id
) NOTNULL) THEN RAISE(ABORT, "Recursive nested recipe detected") END;
END;
DROP VIEW recipes_nestings_resolved;
CREATE VIEW recipes_nestings_resolved
AS
WITH RECURSIVE r1(recipe_id, includes_recipe_id, includes_servings)
AS (
SELECT id, id, 1
FROM recipes
UNION ALL
SELECT rn.recipe_id, r1.includes_recipe_id, rn.servings
FROM recipes_nestings rn, r1 r1
WHERE rn.includes_recipe_id = r1.recipe_id
)
SELECT recipe_id AS id, recipe_id, includes_recipe_id, includes_servings
FROM r1;