Rust/Diesel: How to query and insert into postgres tables which have uuid










3















I have the following schema generated by Diesel:



table! {
user (id)
id -> Uuid,
name -> Text



and the associated model



use diesel::
self,
Queryable,
Insertable,
;
use diesel::prelude::*;
use diesel::sql_types::Uuid;
use super::schema::user;

#[derive(Queryable)]
pub struct User
pub id: Uuid,
pub name: String,


impl User

pub fn get(id: i32, connection: &PgConnection) -> Vec<User>
user::table.load::<User>(connection).unwrap()




I get an error when I try to compile this which says:



21 | user::table.load::<User>(connection).unwrap() 
| ^^^^ the trait `diesel::Queryable<diesel::sql_types::Uuid, diesel::pg::Pg>` is not implemented for `diesel::sql_types::Uuid`


If I try to insert I get a similar error saying that Expression is not implemented.



Could this be a problem with my dependencies or something I may have forgotten to add to the model?



[dependencies]
rocket = "0.4.0-rc.1"
serde = "1.0"
serde_derive = "1.0"
serde_json = "1.0"
diesel = version = "1.0.0", features = ["postgres", "uuid"]
r2d2 = "*"
r2d2-diesel = "*"

[dependencies.rocket_contrib]
version = "0.4.0-rc.1"
default-features = false
features = ["json", "diesel_postgres_pool", "uuid"]









share|improve this question




























    3















    I have the following schema generated by Diesel:



    table! {
    user (id)
    id -> Uuid,
    name -> Text



    and the associated model



    use diesel::
    self,
    Queryable,
    Insertable,
    ;
    use diesel::prelude::*;
    use diesel::sql_types::Uuid;
    use super::schema::user;

    #[derive(Queryable)]
    pub struct User
    pub id: Uuid,
    pub name: String,


    impl User

    pub fn get(id: i32, connection: &PgConnection) -> Vec<User>
    user::table.load::<User>(connection).unwrap()




    I get an error when I try to compile this which says:



    21 | user::table.load::<User>(connection).unwrap() 
    | ^^^^ the trait `diesel::Queryable<diesel::sql_types::Uuid, diesel::pg::Pg>` is not implemented for `diesel::sql_types::Uuid`


    If I try to insert I get a similar error saying that Expression is not implemented.



    Could this be a problem with my dependencies or something I may have forgotten to add to the model?



    [dependencies]
    rocket = "0.4.0-rc.1"
    serde = "1.0"
    serde_derive = "1.0"
    serde_json = "1.0"
    diesel = version = "1.0.0", features = ["postgres", "uuid"]
    r2d2 = "*"
    r2d2-diesel = "*"

    [dependencies.rocket_contrib]
    version = "0.4.0-rc.1"
    default-features = false
    features = ["json", "diesel_postgres_pool", "uuid"]









    share|improve this question


























      3












      3








      3


      1






      I have the following schema generated by Diesel:



      table! {
      user (id)
      id -> Uuid,
      name -> Text



      and the associated model



      use diesel::
      self,
      Queryable,
      Insertable,
      ;
      use diesel::prelude::*;
      use diesel::sql_types::Uuid;
      use super::schema::user;

      #[derive(Queryable)]
      pub struct User
      pub id: Uuid,
      pub name: String,


      impl User

      pub fn get(id: i32, connection: &PgConnection) -> Vec<User>
      user::table.load::<User>(connection).unwrap()




      I get an error when I try to compile this which says:



      21 | user::table.load::<User>(connection).unwrap() 
      | ^^^^ the trait `diesel::Queryable<diesel::sql_types::Uuid, diesel::pg::Pg>` is not implemented for `diesel::sql_types::Uuid`


      If I try to insert I get a similar error saying that Expression is not implemented.



      Could this be a problem with my dependencies or something I may have forgotten to add to the model?



      [dependencies]
      rocket = "0.4.0-rc.1"
      serde = "1.0"
      serde_derive = "1.0"
      serde_json = "1.0"
      diesel = version = "1.0.0", features = ["postgres", "uuid"]
      r2d2 = "*"
      r2d2-diesel = "*"

      [dependencies.rocket_contrib]
      version = "0.4.0-rc.1"
      default-features = false
      features = ["json", "diesel_postgres_pool", "uuid"]









      share|improve this question
















      I have the following schema generated by Diesel:



      table! {
      user (id)
      id -> Uuid,
      name -> Text



      and the associated model



      use diesel::
      self,
      Queryable,
      Insertable,
      ;
      use diesel::prelude::*;
      use diesel::sql_types::Uuid;
      use super::schema::user;

      #[derive(Queryable)]
      pub struct User
      pub id: Uuid,
      pub name: String,


      impl User

      pub fn get(id: i32, connection: &PgConnection) -> Vec<User>
      user::table.load::<User>(connection).unwrap()




      I get an error when I try to compile this which says:



      21 | user::table.load::<User>(connection).unwrap() 
      | ^^^^ the trait `diesel::Queryable<diesel::sql_types::Uuid, diesel::pg::Pg>` is not implemented for `diesel::sql_types::Uuid`


      If I try to insert I get a similar error saying that Expression is not implemented.



      Could this be a problem with my dependencies or something I may have forgotten to add to the model?



      [dependencies]
      rocket = "0.4.0-rc.1"
      serde = "1.0"
      serde_derive = "1.0"
      serde_json = "1.0"
      diesel = version = "1.0.0", features = ["postgres", "uuid"]
      r2d2 = "*"
      r2d2-diesel = "*"

      [dependencies.rocket_contrib]
      version = "0.4.0-rc.1"
      default-features = false
      features = ["json", "diesel_postgres_pool", "uuid"]






      rust rust-diesel






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      edited Jan 20 at 3:43









      Shepmaster

      157k14316457




      157k14316457










      asked Nov 15 '18 at 19:46









      user3912090user3912090

      616




      616






















          1 Answer
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          0














          The type in the struct needs to be a Rust type rather than a SQL type, specifically Uuid from the uuid crate (in Diesel 1.3, only version 0.6 is supported by Diesel). In the code from the question, the Uuid is expanded to a diesel::sql_types::Uuid



          #[derive(Queryable)]
          pub struct User
          pub id: uuid::Uuid,
          pub name: String,






          share|improve this answer
























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            1 Answer
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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

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            active

            oldest

            votes









            0














            The type in the struct needs to be a Rust type rather than a SQL type, specifically Uuid from the uuid crate (in Diesel 1.3, only version 0.6 is supported by Diesel). In the code from the question, the Uuid is expanded to a diesel::sql_types::Uuid



            #[derive(Queryable)]
            pub struct User
            pub id: uuid::Uuid,
            pub name: String,






            share|improve this answer





























              0














              The type in the struct needs to be a Rust type rather than a SQL type, specifically Uuid from the uuid crate (in Diesel 1.3, only version 0.6 is supported by Diesel). In the code from the question, the Uuid is expanded to a diesel::sql_types::Uuid



              #[derive(Queryable)]
              pub struct User
              pub id: uuid::Uuid,
              pub name: String,






              share|improve this answer



























                0












                0








                0







                The type in the struct needs to be a Rust type rather than a SQL type, specifically Uuid from the uuid crate (in Diesel 1.3, only version 0.6 is supported by Diesel). In the code from the question, the Uuid is expanded to a diesel::sql_types::Uuid



                #[derive(Queryable)]
                pub struct User
                pub id: uuid::Uuid,
                pub name: String,






                share|improve this answer















                The type in the struct needs to be a Rust type rather than a SQL type, specifically Uuid from the uuid crate (in Diesel 1.3, only version 0.6 is supported by Diesel). In the code from the question, the Uuid is expanded to a diesel::sql_types::Uuid



                #[derive(Queryable)]
                pub struct User
                pub id: uuid::Uuid,
                pub name: String,







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Jan 20 at 3:43









                Shepmaster

                157k14316457




                157k14316457










                answered Jan 18 at 9:20









                canscabcanscab

                1




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