3b7ed74d11
- examples to fix still
- error_extensions.md ResultExt example does not compile!
- trait ErrorExtensions is not implemented for ParseIntError
- dataloader
- requires sqlx to work. So we either "stub" it OR we rewrite them simpler to use a simple "faux" db library
90 lines
2.1 KiB
Markdown
90 lines
2.1 KiB
Markdown
# 输入值校验器
|
||
|
||
`Async-graphql`内置了一些常用的校验器，你可以在对象字段的参数或者`InputObject`的字段上使用它们。
|
||
|
||
- **maximum=N** 指定数字不能大于`N`
|
||
- **minimum=N** 指定数字不能小于`N`
|
||
- **multiple_of=N** 指定数字必须是`N`的倍数
|
||
- **max_items=N** 指定列表的长度不能大于`N`
|
||
- **min_items=N** 指定列表的长度不能小于`N`
|
||
- **max_length=N** 字符串的长度不能大于`N`
|
||
- **min_length=N** 字符串的长度不能小于`N`
|
||
- **chars_max_length=N** 字符串中unicode字符的的数量不能小于`N`
|
||
- **chars_min_length=N** 字符串中unicode字符的的数量不能大于`N`
|
||
- **email** 有效的email
|
||
- **url** 有效的url
|
||
- **ip** 有效的ip地址
|
||
- **regex=RE** 匹配正则表达式
|
||
|
||
```rust
|
||
# extern crate async_graphql;
|
||
use async_graphql::*;
|
||
|
||
struct Query;
|
||
|
||
#[Object]
|
||
impl Query {
|
||
/// name参数的长度必须大于等于5，小于等于10
|
||
async fn input(&self, #[graphql(validator(min_length = 5, max_length = 10))] name: String) -> Result<i32> {
|
||
# todo!()
|
||
}
|
||
}
|
||
```
|
||
|
||
## 校验列表成员
|
||
|
||
你可以打开`list`属性表示校验器作用于一个列表内的所有成员:
|
||
|
||
```rust
|
||
# extern crate async_graphql;
|
||
use async_graphql::*;
|
||
|
||
struct Query;
|
||
|
||
#[Object]
|
||
impl Query {
|
||
async fn input(&self, #[graphql(validator(list, max_length = 10))] names: Vec<String>) -> Result<i32> {
|
||
# todo!()
|
||
}
|
||
}
|
||
```
|
||
|
||
## 自定义校验器
|
||
|
||
```rust
|
||
# extern crate async_graphql;
|
||
# use async_graphql::*;
|
||
struct MyValidator {
|
||
expect: i32,
|
||
}
|
||
|
||
impl MyValidator {
|
||
pub fn new(n: i32) -> Self {
|
||
MyValidator { expect: n }
|
||
}
|
||
}
|
||
|
||
impl CustomValidator<i32> for MyValidator {
|
||
fn check(&self, value: &i32) -> Result<(), String> {
|
||
if *value == self.expect {
|
||
Ok(())
|
||
} else {
|
||
Err(format!("expect 100, actual {}", value))
|
||
}
|
||
}
|
||
}
|
||
|
||
struct Query;
|
||
|
||
#[Object]
|
||
impl Query {
|
||
/// n的值必须等于100
|
||
async fn value(
|
||
&self,
|
||
#[graphql(validator(custom = "MyValidator::new(100)"))] n: i32,
|
||
) -> i32 {
|
||
n
|
||
}
|
||
}
|
||
```
|