mysql-没有为'f64'实现特性'diesel:：Expression'`
我正在尝试使用diesel和mysql建立一个模型。我的第一个模型编译时没有问题，但当我的第二个模型（用于向我的数据库插入新条目的模型）尝试派生mysql-没有为'f64'实现特性'diesel:：Expression'`,mysql,rust,rust-diesel,Mysql,Rust,Rust Diesel,我正在尝试使用diesel和mysql建立一个模型。我的第一个模型编译时没有问题，但当我的第二个模型（用于向我的数据库插入新条目的模型）尝试派生Insertable时，我收到一系列错误，说明diesel不能使用f64、u16或NaiveDateTime error[E0277]: the trait bound `u16: diesel::Expression` is not satisfied --> src/models.rs:26:10 | 26 | #[derive(In
Insertablef64u16NaiveDateTimeerror[E0277]: the trait bound `u16: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `u16`
|
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Unsigned<diesel::sql_types::Integer>>` for `u16`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `chrono::naive::datetime::NaiveDateTime: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `chrono::naive::datetime::NaiveDateTime`
|
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Date>` for `chrono::naive::datetime::NaiveDateTime`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `f64: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `f64`
|
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Float>` for `f64`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `u16: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `u16`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&u16`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Unsigned<diesel::sql_types::Integer>>` for `&u16`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `chrono::naive::datetime::NaiveDateTime: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `chrono::naive::datetime::NaiveDateTime`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&chrono::naive::datetime::NaiveDateTime`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Date>` for `&chrono::naive::datetime::NaiveDateTime`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `f64: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `f64`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&f64`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Float>` for `&f64`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `u16: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `u16`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&'insert u16`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Unsigned<diesel::sql_types::Integer>>` for `&'insert u16`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `chrono::naive::datetime::NaiveDateTime: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `chrono::naive::datetime::NaiveDateTime`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&'insert chrono::naive::datetime::NaiveDateTime`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Date>` for `&'insert chrono::naive::datetime::NaiveDateTime`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: the trait bound `f64: diesel::Expression` is not satisfied
--> src/models.rs:26:10
|
26 | #[derive(Insertable, Debug, Queryable)]
| ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `f64`
|
= note: required because of the requirements on the impl of `diesel::Expression` for `&'insert f64`
= note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Float>` for `&'insert f64`
= note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]：不满足特性绑定'u16:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^未为'u16'实现trait'diesel:：Expression'`
|
=注意：由于'u16'的'diesel:：expression:：AsExpression'的impl上的要求，因此需要`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'chrono:：naive:：datetime:：NaiveDateTime:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^^^^未为'chrono:：naive:：datetime:：NaiveDateTime'实现特性'diesel:：Expression'`
|
=注意：由于对`chrono:：naive:：datetime:：NaiveDateTime`的`diesel:：expression:：AsExpression`的impl有要求，因此必需`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'f64:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^没有为`f64'实现特性`diesel:：Expression``
|
=注意：由于对`f64`的`diesel:：expression:：AsExpression`的impl有要求，因此需要`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：不满足特性绑定'u16:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^未为'u16'实现trait'diesel:：Expression'`
|
=注意：由于“`&u16”的“diesel:：Expression` impl中的要求，因此需要`
=注意：由于“&&u16”的“diesel:：expression:：AsExpression”impl上的要求，因此需要`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'chrono:：naive:：datetime:：NaiveDateTime:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^^^^未为'chrono:：naive:：datetime:：NaiveDateTime'实现特性'diesel:：Expression'`
|
=注意：由于“&chrono:：naive:：datetime:：NaiveDateTime”的“diesel:：Expression”impl上的要求，因此必需`
=注意：由于“&&chrono:：naive:：datetime:：NaiveDateTime”的“diesel:：expression:：AsExpression”impl上的要求，因此需要此选项`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'f64:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^没有为`f64'实现特性`diesel:：Expression``
|
=注意：由于“&f64”的“diesel:：Expression”impl中的要求，因此需要`
=注意：由于对“&&f64”的“diesel:：expression:：AsExpression”impl的要求，因此需要此选项`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：不满足特性绑定'u16:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^未为'u16'实现trait'diesel:：Expression'`
|
=注：由于“&”insert u16的“diesel:：Expression”impl中的要求，因此需要`
=注意：由于`&'insert u16对`diesel:：expression:：AsExpression`的impl有要求，因此需要`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'chrono:：naive:：datetime:：NaiveDateTime:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^^^^^未为'chrono:：naive:：datetime:：NaiveDateTime'实现特性'diesel:：Expression'`
|
=注意：由于`&'insert chrono:：naive:：datetime:：NaiveDateTime的`diesel:：Expression`的impl上的要求，因此必需`
=注意：由于`&'insert chrono:：NAVIE:：datetime:：NAVIDATETIME:：AsExpression`对`&'insert chrono:：NAVIE:：datetime:：NAVIDATETIME`的impl有要求，因此必需`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
错误[E0277]：未满足特性绑定'f64:diesel:：Expression'
-->src/models.rs:26:10
|
26 |#[派生（可插入、调试、可查询）]
|^^^^^^^没有为`f64'实现特性`diesel:：Expression``
|
=注意：由于“&”insert f64的“diesel:：Expression”impl中的要求，因此需要`
=注意：由于“&”insert f64的“diesel:：expression:：AsExpression”impl中的要求，因此需要`
=注意：此错误源于派生宏（在夜间构建中，使用-Z宏反向跟踪运行以获取更多信息）
use crate::schema::*;
use serde::{Deserialize, Serialize};
use chrono::NaiveDateTime;
#[derive(Debug, Serialize, Deserialize, Queryable)]
pub struct Site {
pub site_id: i32,
pub name: String,
pub slug: String,
pub rack_size: u16,
pub date_created: chrono::NaiveDateTime,
pub latitude: f64,
pub longitude: f64
}
//#[derive(Insertable, Debug, Queryable)]
//#[table_name = "site"]
//pub struct NewSite<'a> {
// pub name: &'a str,
// pub slug: &'a str,
// pub rack_size: &'a u16,
// pub date_created: chrono::NaiveDateTime,
// pub latitude: &'a f64,
// pub longitude: &'a f64
//}
#[derive(Insertable, Debug, Queryable)]
#[table_name = "site"]
pub struct NewSite {
pub name: String,
pub slug: String,
pub rack_size: u16,
pub date_created: chrono::NaiveDateTime,
pub latitude: f64,
pub longitude: f64
}
使用板条箱：：模式：：*；
使用serde:：{反序列化，序列化}；
使用chrono：：NaiveDateTime；
#[派生（调试、序列化、反序列化、可查询）]
发布结构站点{
酒吧网站id:i32，
酒吧名称：String，
酒吧鼻涕虫：字符串，
酒吧架尺寸：u16，
pub date_created:chrono:：NaiveDateTime，
酒吧纬度：f64，
酒吧经度：f64
}
//#[派生（可插入、调试、可查询）]
//#[选项卡
[package]
name = "micd"
version = "0.1.0"
authors = ["First Last <no@gmail.com>"]
edition = "2018"
[dependencies]
actix-web = "2.0.0"
actix-web-httpauth = { git = "https://github.com/actix/actix-web-httpauth" }
chrono = { version = "0.4.10", features = ["serde"] }
derive_more = "0.99.2"
diesel = { version = "1.4.2", features = ["extras", "mysql", "default"] }
dotenv = "0.15.0"
futures = "0.3.1"
r2d2 = "0.8.8"
serde = "1.0"
serde_derive = "1.0"
serde_json = "1.0"
actix-service = "1.0.1"
alcoholic_jwt = "1.0.0"
reqwest = "0.9.22"
actix-rt = "1.0.0"