Problem to bind parm to query-as in sqlx -mysql

help
1

Hi to all gusy ,
I'am new here.. I am a programmer working in c# with experience in .cpp and C as my background.
recently i have heard of Rust and my curiosity to understand what's the state of work on it.

so I decide to install the compiler and try some work specifically with database , because , at least in my opinion, this is a crucial node.

so what's the problem i stumble on and why i ask your help ?.. well ..this is my code ..

use sqlx::{Error, FromRow, MySql, MySqlConnection, MySqlPool, Pool};

#[derive(FromRow, Debug)]  
#[sqlx(rename_all = "camelCase")]
pub struct Tabmag {
    tmAnnu: String,
    tmPref: String,
    tmKeyf: String,
    tmDesc: String,    
    tmCsv: String,
    tmDati: String,
}
pub struct TabmagFilter {
    pm_zone: String,
    pm_country: String,
    pm_datemin: i32,
    pm_datemax: i32,    
}
pub async fn get_tabmag_all(db_ctx: Pool<MySql>, filter: TabmagFilter) -> Result<Vec<Tabmag>, Error> {
    let mut sql = String::from("SELECT * FROM tabmag WHERE 1=1"); // Starting with a dummy condition
    let mut params =  Vec::new();  //  vec[];

    if !filter.pm_zone.is_empty() {
        sql.push_str(" AND tmzone = ?");
        params.push(filter.pm_zone);
    }

    if filter.pm_datemin > 0 {
        sql.push_str(" AND tmdate >= ? AND tmdate <= ?");
        params.push(filter.pm_datemin.to_string());
        params.push(filter.pm_datemax.to_string());
    }

    // Add other filters as needed
    if !filter.pm_country.is_empty() {
        sql.push_str(" AND tmcountry = ?");
        params.push(filter.pm_country);
    }

    sql.push_str(" ORDER BY tmcountry, tmdate");

  let result = sqlx::query_as(&sql)
    .bind(params)      // <--- ERROR 
    .fetch_all(&db_ctx)
    .await?;

    Ok(result)  
}
I tryed to write a query with medium complex filter ( as in the real life ) to see how is sqlx support about it.

when I compile this code i get 
the trait bound `Vec<String>: sqlx::Encode<'_, _>` is not satisfied
the trait `sqlx::Encode<'_, MySql>` is implemented for `Vec<u8>`
for that trait implementation, expected `u8`, found `String`

I read these link what the problem could be

https://users.rust-lang.org/t/how-to-create-vec-for-sqlx-values/66505
https://stackoverflow.com/questions/70029671/how-to-query-using-an-in-clause-and-a-vec-as-parameter-in-rust-sqlx-for-mysql
what is the correct way to add a Vec to bind to the query ??

also i read that the current support ( in sqlx ) for FromRow is limited and stated i have tables with 30-50 ..and more than 60 field i should think to create my own implementation of FromRow ...how to do that ?? could i have any suggestion ??

thank for your help