Question

Two simple tables:

"CREATE TABLE categories(
_id integer primary key autoincrement, 
name text not null
);"

"CREATE TABLE expenses (" +
"_id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, " +
"category_name TEXT REFERENCES categories(name) ON UPDATE CASCADE , " +
"value FLOAT DEFAULT 0 NOT NULL, " +
"date DATE DEFAULT (DATETIME('NOW')) NOT NULL 
);"

I’m wondering why "UPDATE categories SET name='new name' WHERE _id=1" doesn’t change category_name in all rows in the expenses table. Documentation says it should.

Maybe the field I’m refferencing must b a primary key?

Answer 1

Your PK should be the “categories._id” not the “categories.name”, that’s the problem.

Try this:

"CREATE TABLE expenses (" +
"_id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, " +
"category_id integer REFERENCES categories(_id) , " +
"value FLOAT DEFAULT 0 NOT NULL, " +
"date DATE DEFAULT (DATETIME('NOW')) NOT NULL 
);"