trait diesel::Insertable is not implemented

[prsabahrami]

Hey!

I'm pretty new to Diesel and I wanted to run this below piece of code and I got an error. Was wondering if anyone has any idea on why this is happening?

#[derive(Debug, Serialize, Deserialize, Clone, Insertable, AsChangeset)]
#[diesel(table_name = attachment_blobs)]
pub struct AttachmentBlobChangeset {
    pub key: String,
    pub file_name: String,
    pub content_type: Option<String>,
    pub byte_size: i64,
    pub checksum: String,
    pub service_name: String,
}

impl AttachmentBlob {
    pub fn create(db: &mut Connection, item: &AttachmentBlobChangeset) -> QueryResult<Self> {
        use super::schema::attachment_blobs::dsl::*;


        insert_into(attachment_blobs)
            .values(item)
            .get_result::<AttachmentBlob>(db)
    }

As you can see the Insertable is implemented for AttachmentBlobChangeset using derive but when I run this code, I get the below error:

the trait `diesel::Insertable<services::schema::postgres::attachment_blobs::table>` is not implemented for `services::attachment_blob::AttachmentBlobChangeset`

which is saying the trait is not implemented whereas it is.
It is also important to note that the whole code is written in attachment_blob.rs inside of services folder.
Any idea?

[weiznich]

It seems like your question is missing important details as I cannot reproduce the error if I fill in the missing pieces.

For reference the following code works for me:

use diesel::prelude::*;

table! {
    attachment_blobs(key) {
        key -> Text,
        file_name -> Text,
        content_type -> Nullable<Text>,
        byte_size -> BigInt,
        checksum -> Text,
        service_name -> Text,
    }
}

#[derive(Debug, Clone, Insertable, AsChangeset)]
#[diesel(table_name = attachment_blobs)]
pub struct AttachmentBlobChangeset {
    pub key: String,
    pub file_name: String,
    pub content_type: Option<String>,
    pub byte_size: i64,
    pub checksum: String,
    pub service_name: String,
}

#[derive(Queryable)]
struct AttachmentBlob {
    pub key: String,
    pub file_name: String,
    pub content_type: Option<String>,
    pub byte_size: i64,
    pub checksum: String,
    pub service_name: String,
}

impl AttachmentBlob {
    pub fn create(db: &mut PgConnection, item: &AttachmentBlobChangeset) -> QueryResult<Self> {
        use crate::attachment_blobs::dsl::*;

        diesel::insert_into(attachment_blobs)
            .values(item)
            .get_result::<AttachmentBlob>(db)
    }
}

If you still have this problem I would suggest that you put together a complete reproducible example (i.e. something where someone can just run cargo check and get the same error message as you).