我正在尝试使用 PostgreSQL 遵循diesel.rs 教程。当我进入 Diesel 设置步骤时,收到“不支持身份验证方法 10”错误。我该如何解决?
今天我一直在看看Rust的Diesel ORM,继续这个演练,我无法Timestamp上班.
Cargo.toml
[dependencies]
diesel = { version = "0.6.2", features = ["chrono"] }
diesel_codegen = { version = "0.6.2", default-features = false, features = ["nightly", "postgres"] }
dotenv = "0.8.0"
dotenv_macros = "0.8.0"
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models.rs
#[derive(Queryable)]
pub struct Author {
pub id: i32,
pub first_name: String,
pub last_name: String,
pub email: String
}
pub struct Post {
pub id: i32,
pub author: Author,
pub title: String,
pub body: String,
pub published: bool,
pub created: …Run Code Online (Sandbox Code Playgroud) 我有一个我希望通过Diesel使用的SQL表:
CREATE TABLE records (
id BIGSERIAL PRIMARY KEY,
record_type SMALLINT NOT NULL,
value DECIMAL(10, 10) NOT NULL
)
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该表生成以下模式:
table! {
records (id) {
id -> Int8,
record_type -> Int2,
value -> Numeric,
}
}
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Diesel将小数字输出为bigdecimal::BigDecimal,但我想decimal::d128改为使用.我也想映射record_type到枚举,所以我声明我的模型如下:
use decimal::d128;
pub enum RecordType {
A,
B,
}
pub struct Record {
pub id: i64,
pub record_type: RecordType,
pub value: d128,
}
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我不能使用#derive(Queryable, Insertable)因为非标准类型映射,所以我尝试自己实现这些特征:
impl Queryable<records::SqlType, Pg> for Record {
type Row = (i64, …Run Code Online (Sandbox Code Playgroud) 我现在使用此命令在 rustdiesel 中生成模式:
diesel --database-url postgres://postgres:kZLxttcZSN@127.0.0.1:5432/rhythm \
migration run --config-file="${CURRENT_DIR}"/diesel-rhythm.toml
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这是 toml 配置:
[print_schema]
file = "src/model/diesel/rhythm/rhythm_schema.rs"
# This will cause only the users and posts tables to be output
filter = { only_tables = ["favorites", "songs", "playlist"] }
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是否可以让柴油机自动生成模型实体?该实体可能如下所示:
#[derive( Serialize, Queryable, Deserialize,Default)]
pub struct Music {
pub id: i64,
pub name: String,
pub source_id: String
}
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现在我通过句柄编写实体。我应该怎么做才能让它由diesel cli生成,我阅读了文档,但没有找到任何有用的配置。
我松散地遵循 Diesel 的入门指南尝试设置关系数据库,但在编译时出现以下错误:
error[E0433]: failed to resolve: use of undeclared type or module `birds`
--> src/models.rs:9:12
|
9 | pub struct Bird {
| ^^^^ use of undeclared type or module `birds`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0433`.
error: Could not compile `prrr_gql`.
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这是二进制文件:
extern crate prrr_gql;
extern crate diesel;
use self::prrr_gql::*;
use self::models::*;
use self::diesel::prelude::*;
fn main() {
use prrr_gql::schema::cats::dsl::*;
use prrr_gql::schema::birds::dsl::*;
let connection = establish_connection();
let …Run Code Online (Sandbox Code Playgroud) 我正在尝试创建一个可以在柴油中用于插入的结构。具体来说,我正在使结构可插入。编译时出现此错误。
我有一个结构,我试图Insertable通过派生属性来制作。我有一个名为的字段Bounty,它应该代表钱,所以我使用它BigDecimal作为类型。编译后,我收到标题中的错误。我也试过使用,f64但这给出了同样的错误。
#[macro_use]
extern crate diesel;
extern crate bigdecimal;
mod schema {
use bigdecimal::BigDecimal;
table! {
Threads (Id) {
Id -> Int8,
Views -> Int4,
Points -> Int4,
FlagPoints -> Int4,
IsDisabled -> Bool,
IsAnswered -> Bool,
Bounty -> Numeric,
Title -> Varchar,
Body -> Text,
UserId -> Int8,
CreatedBy -> Varchar,
CreatedOn -> Timestamptz,
LastModifiedBy -> Varchar,
LastModifiedOn -> Timestamptz,
}
}
#[allow(non_snake_case)]
#[derive(Debug, Insertable)]
#[table_name = "Threads"]
pub struct InsertableThread …Run Code Online (Sandbox Code Playgroud) 我将 Diesel 与 PostgreSQL 一起使用。我添加了我的迁移,它们工作正常,输出schema.rs文件中的所有内容。直到我注意到我遗漏了created_at一些迁移中的字段。我编辑了 SQL 并运行了diesel migration run. 什么也没发生,没有错误,没有成功。有没有办法解决这个问题并重新运行我的迁移?
我有Diesel生成的以下架构:
table! {
user (id) {
id -> Uuid,
name -> Text
}
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和相关的模型
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()
}
}
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尝试编译此错误时显示错误:
table! {
user (id) {
id -> Uuid,
name -> Text
}
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如果我尝试插入,Expression则会收到类似的错误消息,提示未实现。
这可能是我的依赖项有问题还是我可能忘记将其添加到模型中?
[dependencies]
rocket = "0.4.0-rc.1"
serde = "1.0"
serde_derive = "1.0" …Run Code Online (Sandbox Code Playgroud) 我一直在尝试在我的 Macbook M1 上运行 Rust Diesel crate,但它不起作用。编译的最后部分因以下错误而中断:
\n = note: ld: warning: ignoring file /usr/local/Cellar/libpq/14.1/lib/libpq.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64\n Undefined symbols for architecture arm64:\nRun Code Online (Sandbox Code Playgroud)\n当我得到信息时,libpq我得到以下信息:
maxwellflitton@Maxwells-MacBook-Pro vanguard % brew info libpq \nlibpq: stable 14.1 (bottled) [keg-only]\nPostgres C API library\nhttps://www.postgresql.org/docs/14/libpq.html\n/usr/local/Cellar/libpq/14.1 (2,335 files, 27.8MB)\n Poured from bottle on 2022-01-09 at 00:14:32\nFrom: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/libpq.rb\nLicense: PostgreSQL\n==> Dependencies\nRequired: krb5 \xe2\x9c\x94, openssl@1.1 \xe2\x9c\x94\n==> Caveats\nlibpq is keg-only, which means it was not symlinked into /usr/local,\nbecause conflicts …Run Code Online (Sandbox Code Playgroud) 好吧,这里有点无处可去。在我发布了我的 Mac M1 与 Rust Diesel 的链接器问题并没有得到任何结果之前。因此,我启动了一个 Ec2 实例,并尝试在此处运行此包,并得到以下结果:
error: linking with `cc` failed: exit status: 1
...
= note: /usr/bin/ld: cannot find -lpq
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我已经安装了以下内容:
sudo yum update -y
sudo yum install git -y
sudo yum groupinstall "Development Tools" -y
sudo yum install cmake -y
sudo yum install postgresql-libs -y
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说真的,人们是如何设法让这个箱子运行的?