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






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 20 at 3:43









      Shepmaster

      157k14316457




      157k14316457










      asked Nov 15 '18 at 19:46









      user3912090user3912090

      616




      616






















          1 Answer
          1






          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
























            Your Answer






            StackExchange.ifUsing("editor", function ()
            StackExchange.using("externalEditor", function ()
            StackExchange.using("snippets", function ()
            StackExchange.snippets.init();
            );
            );
            , "code-snippets");

            StackExchange.ready(function()
            var channelOptions =
            tags: "".split(" "),
            id: "1"
            ;
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function()
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled)
            StackExchange.using("snippets", function()
            createEditor();
            );

            else
            createEditor();

            );

            function createEditor()
            StackExchange.prepareEditor(
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader:
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            ,
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            );



            );













            draft saved

            draft discarded


















            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53326887%2frust-diesel-how-to-query-and-insert-into-postgres-tables-which-have-uuid%23new-answer', 'question_page');

            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            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




                1





























                    draft saved

                    draft discarded
















































                    Thanks for contributing an answer to Stack Overflow!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid


                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.

                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function ()
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53326887%2frust-diesel-how-to-query-and-insert-into-postgres-tables-which-have-uuid%23new-answer', 'question_page');

                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    Popular posts from this blog

                    Top Tejano songwriter Luis Silva dead of heart attack at 64

                    政党

                    天津地下鉄3号線