@raybean said:
Need Help Understanding API Fields
Hello,
I have 3 topics where I have questions:
...
...
Topic #3 - Popularity:
I was also wondering how popularity is calculated (either based on profit, views of the movie, or a combination of many elements).
Any official documentation or clarification would be greatly appreciated. Thanks!

See here:
https://developer.themoviedb.org/docs/popularity-and-trending

@raybean said:
Need Help Understanding API Fields
Hello,
I have 3 topics where I have questions:
Topic #1 - Order:
I’m working with TMDB's API and noticed the "order" field in cast and crew credits responses.
However, I can't find documentation that explains what these values specifically represent.

A few specific questions:

1. What determines the "order" value assigned to cast members?
   

It's the same order as in the WEB interface, from left to right or top to bottom.
Starting with the number 0 (zero)
See here in the TMDb Bible.
https://www.themoviedb.org/bible/movie/59f3b16d9251414f20000003#59f73ca49251416e7100000e

1. Does a lower order number (e.g., 0 or 1) correspond to top billing?
   

Not necessarily, but it probably should be.

1. Is the ordering system consistent across all movies/shows?
   

Users can change the order.
Of course, there are errors, but if users follow the rules, yes.

TV Show follows different rules.
https://www.themoviedb.org/bible/tv/59f73eb49251416e71000022
https://www.themoviedb.org/bible/tv/59f743289251416e71000037#59f744609251416e71000043

1. Is this order based on opening credits, end credits, or another source?

I think I already answered this question above.
But... see here:
https://www.themoviedb.org/bible/movie/59f3b16d9251414f20000003#59f73ca49251416e7100000e

@raybean said:
Need Help Understanding API Fields
Hello,
I have 3 topics where I have questions:
...
Topic #2 - Revenue and Budget:
Another question that I have is about the revenue and budget of the movies.
Is there anyway to pull this data from the database.

When you make an API Request for Movie Details you will receive the items budget and revenue in the response.
See here:
https://developer.themoviedb.org/reference/movie-details
For example the movie:
Fight Club (1999)
https://www.themoviedb.org/movie/550-fight-club

budget  63000000
...
revenue 100853753

API Request

https://api.themoviedb.org/3/movie/550?api_key=THE_KEY&language=pt-BR  

Request Response

adult   false
backdrop_path   "/hZkgoQYus5vegHoetLkCJzb17zJ.jpg"
belongs_to_collection   null
budget  63000000
genres  […]
homepage    ""
id  550
imdb_id "tt0137523"
origin_country  […]
original_language   "en"
original_title  "Fight Club"
overview    "Um homem deprimido que s…ama a atenção de Tyler."
popularity  134.463
poster_path "/r3pPehX4ik8NLYPpbDRAh0YRtMb.jpg"
production_companies    […]
production_countries    […]
release_date    "1999-10-15"
revenue 100853753
runtime 139
spoken_languages    […]
status  "Released"
tagline "Má conduta. Caos. Sabão."
title   "Clube da Luta"
video   false
vote_average    8.438
vote_count  29696

I have used “Revenue” and “Budget” field names to try to pull the data but there was nothing that came out for the year of 2018.
...

I couldn't understand your comment.
Do you want data for the whole of 2018?

I am trying to pull movies from 2018 into my dataset. I wasn't able to pull the revenue and budget when I used the field names 'revenue' and 'budget'. I am using the Movie Details API.

For the meaning of the different fields and the rules that apply to them, I invite you to read our rules.

@raybean said:
I am trying to pull movies from 2018 into my dataset.
I wasn't able to pull the revenue and budget when I used the field names 'revenue' and 'budget'.
I am using the Movie Details API.

Not all Movies have values ​​in these fields.
Please provide the link to 3 or 4 films from 2018 that you believe returned an error.