@Gydini13 said:
Get movie by genres
Hi, I can't find how to get all movies in only one genre (
I already get genres ID from API)
Could you help me?

Discover - Filter by Genre
First you need to have the list of Genres with their IDs.
The list of Genre IDs, for Movies and TV, can be found here:
get/genre/movie/list - https://developers.themoviedb.org/3/genres/get-movie-list
get/genre/tv/list - https://developers.themoviedb.org/3/genres/get-tv-list

For example, the Comedy Genre ID for movies is 35.

Knowing the Genre ID you want, make an API Request of type get / discover / movie or get / discover / tv
https://developers.themoviedb.org/3/discover/movie-discover
https://developers.themoviedb.org/3/discover/tv-discover
And use the with_genres and/or without_genres parameter.
More than one genre can be searched using the comma or pipe feature

Also note that a number of filters support being comma (,) or pipe (|) separated.
Comma's are treated like an AND and query while Pipe's are an OR.

AND (with Comma) &with_genres=35,37,80
OR (with Pipe) &with_genres=35|37|80
You can use any other filter simultaneously. &year=, &sort_by=, &with_cast= etc...

Example

https://api.themoviedb.org/3/discover/movie?api_key=THE_KEY&language=en-US&sort_by=release_date.desc&page=1&with_genres=35,37,80  
https://api.themoviedb.org/3/discover/tv?api_key=<<api_key>>&language=en-US&sort_by=first_air_date.desc&page=1&with_genres=35,37,80