[Backend] Post search based on distance

[irfanbozkurt]

Description:

Based on my research last week (see finalized results here), today I decided to implement Spherical Law of Cosines in a query for distance-based search queries.

Here's the query:

Todo's:

• Find a way to add this custom query into Django's filtering
• Implement the search endpoint

Task Deadline: 17.12.2022 22:00

[irfanbozkurt]

I had to completely change the search endpoint to only send raw queries to the database. Although it was challenging, I found a way to implement desired functionality.

[irfanbozkurt]

Usage:
If you add a "dist" parameter to the post search endpoint, you should also pass "longitude" and "latitude" parameters; and the endpoint will only bring you posts that were created within "dist" kilometers.

[irfanbozkurt]

I added the usage information to the old documentation as well. Other teams can refer to there.

[oguzhandemirelx]

A wonderful improvement, my friend. I tested the changes locally and had no issues. Merged!