trait bounds not satisfied inside FromRow. Even though they are

[chris-the-wiz]

I have a structure:

#[derive(Debug, Clone,Deserialize)]
pub (crate) struct Blogpost{
  pub creation_time: DateTime<Utc>,
  pub title: Arc<str>,
  pub id: i64,
  pub body: Arc<str>,
}

and I implent the FromRow trait for it:

impl<'r> FromRow<'r, PgRow> for Blogpost {
  fn from_row(row: &'r PgRow) -> Result<Self, Error> {
    let  creation_time:DateTime<Utc> =  row.try_get("creation_time")?;
    let id:i64  =  row.try_get("id")?;
    let  titles:String = row.try_get("title")?;
    let title:Arc<str> = match Arc::<str>::try_from(titles){
      Ok(ok) =>  ok,
      Err(_) => { 
        let result:Arc<str>  = Arc::<str>::from("default title".to_string());
        result
      }
    };
    let body: Option<String> = row.try_get("body")?;
    let body  = body.map(|b| Arc::from(b)).unwrap_or_else(|| Arc::from(""));
   
    Ok( Blogpost{
        creation_time, title,id, body})    
  }
}

in the database the table is defined as :

CREATE TABLE IF NOT EXISTS blogposts
(
    id BIGINT PRIMARY KEY NOT NULL,
    creation_time TIMESTAMP WITH TIME ZONE DEFAULT (now() AT TIME ZONE 'utc') NOT NULL,
    title VARCHAR(255) NOT NULL,
    body TEXT
);

the error i get:

let blogposts: Vec<Blogpost> = sqlx::query_as!(Blogpost, "SELECT * FROM blogposts")
    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `From<std::option::Option<std::string::String>>` is not implemented for `Arc<str>`
    |
    = help: the following other types implement trait `From<T>`:
              <Arc<str> as From<&str>>
              <Arc<str> as From<std::string::String>>
    = note: required for `std::option::Option<std::string::String>` to implement `Into<Arc<str>>`
    = note: this error originates in the macro `$crate::sqlx_macros::expand_query` which comes from the expansion of the macro `sqlx::query_as` (in Nightly builds, run with -Z macro-backtrace for more info)

I cannot define the impl Into<Arc<str>> for Option<String> cause it is defined outside of the package.

the title defined in sql as VARCHAR(255) NOT NULL gets through but body causes the compiler to choke. Could you help me with solving this somehow? Why do I even need to implement that Into trait if i am handling the conversion inside the FromRow function by myself? I am stuck