Error: reqwest::Error { kind: Decode, source: Error("missing field title", line: 1, column: 249) }

[Jyo561]

use serde::{Deserialize, Serialize};
use std::env;
use reqwest::blocking::Client;
use structopt::StructOpt;

#[derive(StructOpt)]
struct Cli {
    query: String,
    #[structopt(short, long)]
    api_key: Option<String>,
}

#[derive(Serialize, Deserialize)]
struct MovieData {
    title: String,
    year: String,
    imdb_id: String,
    #[serde(rename = "Type")]
    type_: String,
    poster: String,
}

#[derive(Serialize, Deserialize)]
struct SearchResults {
    Search: Vec<MovieData>,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let args = Cli::from_args();
    let api_key = args.api_key.unwrap_or("<API-KEY>".to_string());
    let url = format!(
        "http://www.omdbapi.com/?s={}&apikey={}",
        args.query, api_key
    );

    let client = Client::new();
    let response = client.get(&url).send()?;

    if response.status().is_success() {
        let search_results: SearchResults = response.json()?;
        for movie in search_results.Search {
            println!("{} ({})", movie.title, movie.year);
            println!("IMDB ID: {}", movie.imdb_id);
            println!("Type: {}", movie.type_);
            println!("Poster: {}", movie.poster);
            println!();
        }
        Ok(())
    } else {
        println!("Error: {}", response.status());
        Ok(())
    }
}

this is my code

[seanmonstar]

The error message itself tells you issue: it failed deserializing because there is not title present in the response. Is that field not always there? You might need to change it to be Option<String> instead.

[Jyo561]

The title is always present and its required else the API has no use

 {
      "Title": "Batman v Superman: Dawn of Justice",
      "Year": "2016",
      "imdbID": "tt2975590",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BYThjYzcyYzItNTVjNy00NDk0LTgwMWQtYjMwNmNlNWJhMzMyXkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_SX300.jpg"
    },
    {
      "Title": "Superman Returns",
      "Year": "2006",
      "imdbID": "tt0348150",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BNzY2ZDQ2MTctYzlhOC00MWJhLTgxMmItMDgzNDQwMDdhOWI2XkEyXkFqcGdeQXVyNjc1NTYyMjg@._V1_SX300.jpg"
    },
    {
      "Title": "Superman",
      "Year": "1978",
      "imdbID": "tt0078346",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BMzA0YWMwMTUtMTVhNC00NjRkLWE2ZTgtOWEzNjJhYzNiMTlkXkEyXkFqcGdeQXVyNjc1NTYyMjg@._V1_SX300.jpg"
    },
    {
      "Title": "Superman II",
      "Year": "1980",
      "imdbID": "tt0081573",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BODk2NjgzNTEtYzZhZC00ZTBkLTllMGQtMmMxMzU1NDRkM2RlXkEyXkFqcGdeQXVyNjc1NTYyMjg@._V1_SX300.jpg"
    },
    {
      "Title": "Superman III",
      "Year": "1983",
      "imdbID": "tt0086393",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BMzI3ZDllMTctNmI2Mi00OGQ4LTk2ZTQtYTJhMjA5ZGI2YmRkXkEyXkFqcGdeQXVyNjUwNzk3NDc@._V1_SX300.jpg"
    },
    {
      "Title": "Batman v Superman: Dawn of Justice (Ultimate Edition)",
      "Year": "2016",
      "imdbID": "tt18689424",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BN2I4OTllM2MtMWVhNC00MjkzLWJlMDUtN2FhMGQ2ZGVjMjllXkEyXkFqcGdeQXVyMTEyNzgwMDUw._V1_SX300.jpg"
    },
    {
      "Title": "Superman IV: The Quest for Peace",
      "Year": "1987",
      "imdbID": "tt0094074",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BMmIwZWY1YTYtNDlhOS00NDRmLWI4MzItNjk2NDc1N2NhYzNlXkEyXkFqcGdeQXVyNTUyMzE4Mzg@._V1_SX300.jpg"
    },
    {
      "Title": "Superman & Lois",
      "Year": "2021–",
      "imdbID": "tt11192306",
      "Type": "series",
      "Poster": "https://m.media-amazon.com/images/M/MV5BMzdmYjAyODUtMTFkOS00MDg1LTljMDAtNzhiYTg5NjY1NjM5XkEyXkFqcGdeQXVyMTUzMTg2ODkz._V1_SX300.jpg"
    },
    {
      "Title": "Superman/Batman: Apocalypse",
      "Year": "2010",
      "imdbID": "tt1673430",
      "Type": "movie",
      "Poster": "https://m.media-amazon.com/images/M/MV5BMjk3ODhmNjgtZjllOC00ZWZjLTkwYzQtNzc1Y2ZhMjY2ODE0XkEyXkFqcGdeQXVyNTAyODkwOQ@@._V1_SX300.jpg"
    },
    {
      "Title": "Lois & Clark: The New Adventures of Superman",
      "Year": "1993–1997",
      "imdbID": "tt0106057",
      "Type": "series",
      "Poster": "https://m.media-amazon.com/images/M/MV5BZTU1ZGFjNzEtZWYzZC00ZmI0LTg2NmMtN2YyNTY4YzhlODIyXkEyXkFqcGdeQXVyMjExMjk0ODk@._V1_SX300.jpg"
    }

This is a sample of the Api Data

[Jyo561]

The error message itself tells you issue: it failed deserializing because there is not title present in the response. Is that field not always there? You might need to change it to be Option<String> instead.

I tried doing

title:Option<String>

received this error

error[E0277]: `std::option::Option<std::string::String>` doesn't implement `std::fmt::Display`
  --> src/main.rs:42:33
   |
42 |             println!("{} ({})", movie.title, movie.year);
   |                                 ^^^^^^^^^^^ `std::option::Option<std::string::String>` cannot be formatted with the default formatter
   |
   = help: the trait `std::fmt::Display` is not implemented for `std::option::Option<std::string::String>`
   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)

[seanmonstar]

"Title": "Batman v Superman: Dawn of Justice (Ultimate Edition)", suggests the field name has an uppercase T. So, you could do Title: String, or you could use a serde attribute on it, like #[serde(alias = "Title")].

[Jyo561]

Got it
I converted all the parameters according to the API Data and it works now

[seanmonstar]

You're welcome. 👍