Please help me to understand diesel error

[ivmazurenko]

Hi, can you help me a little?

I have a simple model:

#[derive(Insertable)]
#[table_name = "TodoItems"]
pub struct InsertableTodoItem {
    pub content: String,
    pub user_id: i32
}

And a simple schema:

table! {
    TodoItems (id) {
        id -> Integer,
        user_id -> Integer,
        content -> Text,
    }
}

table! {
    Users (id) {
        id -> Integer,
        first_name -> Text,
        last_name -> Text,
        email -> Text,
        password -> Text,
    }
}

allow_tables_to_appear_in_same_query!(
    TodoItems,
    Users,
);

My model created with next migration

CREATE TABLE TodoItems (
  id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL references User (id),
  content TEXT NOT NULL
)

After i try to insert a new item with next code:

let insertable_todo_item = InsertableTodoItem { ... };

diesel::insert_into(TodoItems::table)
    .values(insertable_todo_item)
    .execute(&sqlite_connection)
    .expect("Error saving new todo item")

I've got a annoying unreadable error:

error[E0277]: the trait bound `model::todo_item::InsertableTodoItem: diesel::Insertable<data::schema::TodoItems::table>` is not satisfied
  --> src/data/todo_item.rs:50:10
   |
50 |         .values(insertable_todo_item)
   |          ^^^^^^ the trait `diesel::Insertable<data::schema::TodoItems::table>` is not implemented for `model::todo_item::InsertableTodoItem`
   |
   = help: the following implementations were found:
             <&'insert model::todo_item::InsertableTodoItem as diesel::Insertable<data::schema::TodoItems::table>>

error[E0275]: overflow evaluating the requirement `<_ as diesel::Column>::Table`
  --> src/data/todo_item.rs:51:10
   |
51 |         .execute(&sqlite_connection)
   |          ^^^^^^^
   |
   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `(&_, &_, &_, &_, &_, &_)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `&(_, _, _, _, _, _)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `(&(_, _, _, _, _, _), &_, &_, &_, &_, &_)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `&((_, _, _, _, _, _), _, _, _, _, _)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `(&((_, _, _, _, _, _), _, _, _, _, _), &_, &_, &_, &_, &_)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `&(((_, _, _, _, _, _), _, _, _, _, _), _, _, _, _, _)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `(&(((_, _, _, _, _, _), _, _, _, _, _), _, _, _, _, _), &_, &_, &_, &_, &_)`
   = note: required because of the requirements on the impl of `diesel::Insertable<data::schema::TodoItems::table>` for `&((((_, _, _, _, _, _), _, _, _, _, _), _, _, _, _, _), _, _, _, _, _)`

   How can i fix it? Where can i ask a question next time?