Postgresql 柴油机（锈库）不'；I don’我不允许发表更新声明

结构是

#[derive(Identifiable, Queryable, Debug)]
#[table_name = "users"]
pub struct QueryableUser {
    pub id: i32,
    pub username: String,
    pub password: String,
    pub sex: bool,
    pub profile: Option<String>,
    pub birth: chrono::NaiveDate,
}

它给了我这个错误

error[E0277]: the trait bound `user::QueryableUser: diesel::Identifiable` is not satisfied
  --> src\message_handler\set_profile.rs:36:13
   |
36 |             diesel::update(user).set(profile.eq(None));
   |             ^^^^^^^^^^^^^^ the trait `diesel::Identifiable` is not implemented for `user::QueryableUser`
   |
   = help: the following implementations were found:
             <&'ident user::QueryableUser as diesel::Identifiable>
   = note: required because of the requirements on the impl of `diesel::query_builder::IntoUpdateTarget` for `user::QueryableUser`
   = note: required by `diesel::update`

error[E0277]：未满足特性绑定'user:：QueryableUser:diesel:：identification'
-->src\message\u handler\set\u profile.rs:36:13
|
36 |柴油机：：更新（用户）.set（profile.eq（无））；
|^^^^^^^^^^^^^^^^^^^^^^^^^未为“user:：QueryableUser”实现特征“diesel:：identificatable”`
|
=帮助：找到了以下实现：
我忘了在
diesel:：update（user）.set（profile.eq（None））中借用user

error[E0277]: the trait bound `user::QueryableUser: diesel::Identifiable` is not satisfied
  --> src\message_handler\set_profile.rs:36:13
   |
36 |             diesel::update(user).set(profile.eq(None));
   |             ^^^^^^^^^^^^^^ the trait `diesel::Identifiable` is not implemented for `user::QueryableUser`
   |
   = help: the following implementations were found:
             <&'ident user::QueryableUser as diesel::Identifiable>
   = note: required because of the requirements on the impl of `diesel::query_builder::IntoUpdateTarget` for `user::QueryableUser`
   = note: required by `diesel::update`