Hi,
With my project I'd like to create an industry-aimed application that
offers the users to gain a quick and easy overview over different
jobs. Therefore I've thought of three database models:
1) The basic Material model. This model consists of simple fields like
the name of the material, its size and weight, its purchase price, its
stock location etc.
2) The Set model. This model consists of multiple materials and some
other simple fields similar to those in 1).
3) The Job overview model. This model consists of multiple sets and
some job-related attributes.
The basic material model of course is easy to design, but I got stuck
at the following problem:
How do I define a model field for the set model that lets the user
insert the material models like e.g. on a shopping list ("I want 20
units of this, 5 units of that etc.")? My best approach so far would
be a ManyToManyField(Material) but this field only lets me define
which types of materials I'd like to include in a set, not how many of
these materials. Also, as far as I understood, the ManyToManyField
links materials and sets bi-directional whereas I'd like only a
unidirectional link from set model to material model.
I'm sure there's an elegant and sophisticated way to solve this issue
(like in many Django uses I've experienced so far), but as I'm quite
new to both Django and Python I require a bit of your friendly help,
please. ;-)
I hope I described my problem properly, if there's something not fully
clear, just ask.
Best regards and thanks in advance!
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