[英]Dataloader with Knex.js
在我更新到数据加载器之前,这段代码运行良好dataloader: 2.0.0
const productLoader = new DataLoader(async keys => {
const products: Product[] = await knex('product')
.whereIn('id', keys)
.select()
const productMap: any = {}
products.forEach((p: any) => {
productMap[p.id] = p
})
return keys.map((k: any) => productMap[k])
})
export default productLoader
现在它给出了错误:
loader.ts:7:14 - error TS2769: No overload matches this call.
The last overload gave the following error.
Argument of type '"id"' is not assignable to parameter of type 'string[]'.
7 .whereIn('id', keys)
~~~~
node_modules/knex/types/index.d.ts:1137:5
1137 <TRecordInner, TResultInner>(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1138 columnNames: string[],
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1139 values: QueryBuilder<TRecordInner, TResultInner>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1140 ): QueryBuilder<TRecord, TResult>;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The last overload is declared here.
Found 1 error.
我做错了什么?
// package.json
"dataloader": "^2.0.0",
"knex": "^0.20.2",
堆栈:Apollo-server-express、TypeScript、Postgres、Knex.js
似乎 knex (TypeScript) 期望您将字符串数组 ( string[]
) 设置为whereIn
的第一个参数,如下所示:
const products: Product[] = await knex('product')
.whereIn(['id'], keys)
.select();
这与在多个列中搜索时相同(以下示例来自 Knex.js 文档):
knex.select('name').from('users')
.whereIn(['account_id', 'email'], [[3, 'test3@example.com'], [4, 'test4@example.com']])
希望能帮助到你,
此致
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