Commit Graph

6 Commits

Author SHA1 Message Date
jordi fita mas 90982b49ff Move the product_id field from invoice_product to a separate table
We are going to allow invoices with products that are not (yet) inserted
into the products table.

We always allowed to have products in invoices with a totally different
name, description, price, and whatnot, but until now we had the product
id in these invoice lines for statistics purposes.

However, Oriol raised the concern that this requires for the products
to be inserted before we can create an invoice with them, and we do not
plan to have a “create product while invoicing” feature, thus it would
mean that people would need to cancel the new invoice, create the new
product, and then start the invoice again from scratch.

The compromise is to allow products in the invoice that do not have a
product_id, meaning that at the time the invoice was created they were
not (yet) in the products table.  Oriol sees this stop-invoice-create-
product issue more important than the accurate statistics of product
sales, as it will probably be only one or two units off, anyway.

I did not want to allow NULL values to the invoice product’s product_id
field, because NULL means “dunno” instead of “no product”, so i had to
split that field to a separate table that relates an invoice product
with a registered product.
2023-04-19 19:30:12 +02:00
jordi fita mas f77f933e4a Add the payment method to invoices 2023-03-05 18:50:57 +01:00
jordi fita mas 31ef3ea47a Add company’s default payment method
I had to use a deferrable foreign key because the payment methods have
a reference to the company, and the company now a circular reference to
payment method.
2023-03-04 22:15:52 +01:00
jordi fita mas 11d51df7fa Introduce the concept of tax class
We want to show the percentage of the tax as columns in the invoice,
but until now it was not possible to have a single VAT column when
products have different VAT (e.g., 4 % and 10 %), because, as far
as the application is concerned, these where ”different taxes”.  We
also think it would be hard later on to compute the tax due to the
government.

So, tax classes is just a taxonomy to be able to have different names
and rates for the same type of tax, mostly VAT and retention in our
case.
2023-02-28 12:02:27 +01:00
jordi fita mas de7d167e65 Add constraints to reject empty product and companies names 2023-02-17 12:39:32 +01:00
jordi fita mas 9bddb548a2 Add invoice product tax relation 2023-02-15 14:49:06 +01:00