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114 lines
3.2 KiB
SQL
114 lines
3.2 KiB
SQL
CREATE TABLE quantity_unit_conversions (
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id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
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from_qu_id INT NOT NULL,
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to_qu_id INT NOT NULL,
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factor REAL NOT NULL,
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product_id INT,
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row_created_timestamp DATETIME DEFAULT (datetime('now', 'localtime'))
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);
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CREATE TRIGGER quantity_unit_conversions_custom_unique_constraint_INS BEFORE INSERT ON quantity_unit_conversions
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BEGIN
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-- Necessary because unique constraints don't include NULL values in SQLite, and also because the constraint should include the products default conversion factor
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SELECT CASE WHEN((
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SELECT 1
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FROM quantity_unit_conversions
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WHERE from_qu_id = NEW.from_qu_id
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AND to_qu_id = NEW.to_qu_id
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AND IFNULL(product_id, 0) = IFNULL(NEW.product_id, 0)
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UNION
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SELECT 1
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FROM products
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WHERE id = NEW.product_id
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AND qu_id_purchase = NEW.from_qu_id
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AND qu_id_stock = NEW.to_qu_id
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)
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NOTNULL) THEN RAISE(ABORT, "Unique constraint violation") END;
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END;
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CREATE TRIGGER quantity_unit_conversions_custom_unique_constraint_UPD BEFORE UPDATE ON quantity_unit_conversions
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BEGIN
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-- Necessary because unique constraints don't include NULL values in SQLite, and also because the constraint should include the products default conversion factor
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SELECT CASE WHEN((
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SELECT 1
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FROM quantity_unit_conversions
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WHERE from_qu_id = NEW.from_qu_id
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AND to_qu_id = NEW.to_qu_id
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AND IFNULL(product_id, 0) = IFNULL(NEW.product_id, 0)
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AND id != NEW.id
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UNION
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SELECT 1
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FROM products
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WHERE id = NEW.product_id
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AND qu_id_purchase = NEW.from_qu_id
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AND qu_id_stock = NEW.to_qu_id
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)
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NOTNULL) THEN RAISE(ABORT, "Unique constraint violation") END;
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END;
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CREATE VIEW quantity_unit_conversions_resolved
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AS
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-- First: Product "purchase to stock" conversion factor
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SELECT
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p.id AS id, -- Dummy, LessQL needs an id column
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p.id AS product_id,
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p.qu_id_purchase AS from_qu_id,
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qu_from.name AS from_qu_name,
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p.qu_id_stock AS to_qu_id,
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qu_to.name AS to_qu_name,
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p.qu_factor_purchase_to_stock AS factor
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FROM products p
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JOIN quantity_units qu_from
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ON p.qu_id_purchase = qu_from.id
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JOIN quantity_units qu_to
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ON p.qu_id_stock = qu_to.id
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UNION
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-- Second: Product specific overrides
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SELECT
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p.id AS id, -- Dummy, LessQL needs an id column
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p.id AS product_id,
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quc.from_qu_id AS from_qu_id,
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qu_from.name AS from_qu_name,
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quc.to_qu_id AS to_qu_id,
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qu_to.name AS to_qu_name,
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quc.factor AS factor
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FROM products p
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JOIN quantity_unit_conversions quc
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ON p.qu_id_stock = quc.from_qu_id
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AND p.id = quc.product_id
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JOIN quantity_units qu_from
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ON quc.from_qu_id = qu_from.id
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JOIN quantity_units qu_to
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ON quc.to_qu_id = qu_to.id
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UNION
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-- Third: Default quantity unit conversion factors
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SELECT
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p.id AS id, -- Dummy, LessQL needs an id column
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p.id AS product_id,
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p.qu_id_stock AS from_qu_id,
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qu_from.name AS from_qu_name,
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quc.to_qu_id AS to_qu_id,
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qu_to.name AS to_qu_name,
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quc.factor AS factor
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FROM products p
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JOIN quantity_unit_conversions quc
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ON p.qu_id_stock = quc.from_qu_id
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AND quc.product_id IS NULL
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JOIN quantity_units qu_from
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ON quc.from_qu_id = qu_from.id
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JOIN quantity_units qu_to
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ON quc.to_qu_id = qu_to.id;
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DROP TRIGGER cascade_change_qu_id_stock;
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CREATE TRIGGER cascade_change_qu_id_stock AFTER UPDATE ON products
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BEGIN
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UPDATE recipes_pos
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SET qu_id = NEW.qu_id_stock
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WHERE product_id = NEW.id
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AND qu_id = OLD.qu_id_stock;
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END;
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