Product can have different prices with attributes (database)

modules/module_index_act_mysql_setup.go

@@ -254,6 +254,7 @@ func (this *Modules) RegisterAction_IndexMysqlSetup() *Action {
 		if _, err = tx.Exec(
 			`CREATE TABLE shop_products (
 				id int(11) NOT NULL AUTO_INCREMENT COMMENT 'AI',
+				parent_id int(11) DEFAULT NULL,
 				user int(11) NOT NULL COMMENT 'User id',
 				currency int(11) NOT NULL COMMENT 'Currency id',
 				price float(8,2) NOT NULL COMMENT 'Product price',
@@ -465,7 +466,7 @@ func (this *Modules) RegisterAction_IndexMysqlSetup() *Action {
 			return
 		}
 		if _, err = tx.Exec(
-			`INSERT INTO settings (name, value) VALUES ('database_version', '000000009');`,
+			`INSERT INTO settings (name, value) VALUES ('database_version', '000000010');`,
 		); err != nil {
 			tx.Rollback()
 			wrap.MsgError(err.Error())
@@ -741,6 +742,11 @@ func (this *Modules) RegisterAction_IndexMysqlSetup() *Action {
 			wrap.MsgError(err.Error())
 			return
 		}
+		if _, err = tx.Exec(`ALTER TABLE shop_products ADD KEY FK_shop_products_parent_id (parent_id);`); err != nil {
+			tx.Rollback()
+			wrap.MsgError(err.Error())
+			return
+		}
 		if _, err = tx.Exec(`ALTER TABLE users ADD UNIQUE KEY email (email);`); err != nil {
 			tx.Rollback()
 			wrap.MsgError(err.Error())
@@ -876,6 +882,14 @@ func (this *Modules) RegisterAction_IndexMysqlSetup() *Action {
 			wrap.MsgError(err.Error())
 			return
 		}
+		if _, err = tx.Exec(`
+			ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_parent_id
+			FOREIGN KEY (parent_id) REFERENCES shop_products (id) ON DELETE RESTRICT;
+		`); err != nil {
+			tx.Rollback()
+			wrap.MsgError(err.Error())
+			return
+		}
 
 		// Commit all changes
 		err = tx.Commit()

support/migrate/000000001.go

@@ -15,4 +15,5 @@ var Migrations = map[string]func(*sqlw.DB, string) error{
 	"000000007": Migrate_000000007,
 	"000000008": Migrate_000000008,
 	"000000009": Migrate_000000009,
+	"000000010": Migrate_000000010,
 }

support/migrate/000000010.go

@@ -0,0 +1,27 @@
+package migrate
+
+import (
+	"golang-fave/engine/sqlw"
+)
+
+func Migrate_000000010(db *sqlw.DB, host string) error {
+	// Changes
+	if _, err := db.Exec(`ALTER TABLE shop_products ADD COLUMN parent_id INT(11) DEFAULT NULL AFTER id;`); err != nil {
+		return err
+	}
+
+	// Indexes
+	if _, err := db.Exec(`ALTER TABLE shop_products ADD KEY FK_shop_products_parent_id (parent_id);`); err != nil {
+		return err
+	}
+
+	// References
+	if _, err := db.Exec(`
+		ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_parent_id
+		FOREIGN KEY (parent_id) REFERENCES shop_products (id) ON DELETE RESTRICT;
+	`); err != nil {
+		return err
+	}
+
+	return nil
+}

support/schema.sql

@@ -84,6 +84,7 @@ CREATE TABLE shop_product_images (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 CREATE TABLE shop_products (
 	id int(11) NOT NULL AUTO_INCREMENT COMMENT 'AI',
+	parent_id int(11) DEFAULT NULL,
 	user int(11) NOT NULL COMMENT 'User id',
 	currency int(11) NOT NULL COMMENT 'Currency id',
 	price float(8,2) NOT NULL COMMENT 'Product price',
@@ -141,6 +142,7 @@ ALTER TABLE shop_products ADD UNIQUE KEY alias (alias);
 ALTER TABLE shop_products ADD KEY FK_shop_products_user (user);
 ALTER TABLE shop_products ADD KEY FK_shop_products_currency (currency);
 ALTER TABLE shop_products ADD KEY FK_shop_products_category (category);
+ALTER TABLE shop_products ADD KEY FK_shop_products_parent_id (parent_id);
 ALTER TABLE users ADD UNIQUE KEY email (email);
 
 # References
@@ -160,3 +162,4 @@ ALTER TABLE shop_product_images ADD CONSTRAINT FK_shop_product_images_product_id
 ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_user FOREIGN KEY (user) REFERENCES users (id) ON DELETE RESTRICT;
 ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_currency FOREIGN KEY (currency) REFERENCES shop_currencies (id) ON DELETE RESTRICT;
 ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_category FOREIGN KEY (category) REFERENCES shop_cats (id) ON DELETE RESTRICT;
+ALTER TABLE shop_products ADD CONSTRAINT FK_shop_products_parent_id FOREIGN KEY (parent_id) REFERENCES shop_products (id) ON DELETE RESTRICT;