I am struggling with conversion to django query having raw sql I am new in django and any help will be appreciated There are simple models: Winemaker – target model Wine Post Winemaker has 1+ Wines Wine has 1+ Posts I know that it should be done with annotations but have no idea how to implement it. Ans…
Tag: django-queryset
Django – complicated ORM Query (related_set)
I have model Car, Listing and Website. I want to filter all car objects that have listing object on the given website but the listing needs to be active. To get all car objects that have listing object on the given website: But how do I filter out inactive listings? I want something like: Answer You would do …
django: group by extracting month and year from a date
im trying to get a list of invoicepositions where there hasn’t been payed an payout to a person. Looking in the internet i came to this “Solution” but the query, that comes out is: so he added “created_at” and the id from the invoiceposition model although i don’t want that…
Django many-to-many: Best way to get elements in one related query set but exclude elements in other related query sets?
Consider these related models: In a view, I need to query to get all Bs related to a given A while excluding all Bs related with a set of other As. I need the grey area: My current, grossly inefficient approach is as follows: In my application, previous_As could have nearly 1,000 elements, which makes this ap…