我正在定义以下Query对象：
export const Query = {
// Feed
feed(parent, args, ctx: Context, info) {
const { filter, skip, first, orderBy } = args
const where = filter
? {
AND: [
{ status: 'ACTIVE' },
{
OR: [
{ name_contains: filter },
{ description_contains: filter }
]
}
]
}
: { status: 'ACTIVE' }
return ctx.db.query.listings({ where, skip, first, orderBy }, info)
},
// ...
}
TS编译器抱怨status: 'ACTIVE'部分：
[ts]
Argument of type '{ where: { AND: ({ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_c...' is not assignable to parameter of type '{ where?: ListingWhereInput; orderBy?: ListingOrderByInput; skip?: number; after?: string; before...'.
Types of property 'where' are incompatible.
Type '{ AND: ({ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_contains?:...' is not assignable to type 'ListingWhereInput'.
Type '{ AND: ({ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_contains?:...' is not assignable to type 'ListingWhereInput'.
Types of property 'AND' are incompatible.
Type '({ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_contains?: undefi...' is not assignable to type 'ListingWhereInput | ListingWhereInput[]'.
Type '({ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_contains?: undefi...' is not assignable to type 'ListingWhereInput[]'.
Type '{ status: string; OR?: undefined; } | { OR: ({ name_contains: any; description_contains?: undefin...' is not assignable to type 'ListingWhereInput'.
Type '{ status: string; OR?: undefined; }' is not assignable to type 'ListingWhereInput'.
Types of property 'status' are incompatible.
Type 'string' is not assignable to type 'Status'.
请注意，Status类型是基于GraphQL SDL中的enum自动生成的，如下所示：
enum Status {
ACTIVE
EXPIRED
SOLD
DELETED
}
生成的TS定义如下所示：
export type Status =
'ACTIVE' |
'EXPIRED' |
'SOLD' |
'DELETED'
我不明白为什么TS编译器会抱怨status: 'ACTIVE'部分。根据我的理解，这应该工作，因为status只能是四个定义的字符串值之一？！
更多信息：
如果它有帮助，这里是其他相关类型的生成类型定义（一切都是基于GraphQL SDL生成的）：
export type Query = {
listings: (args: { where?: ListingWhereInput, orderBy?: ListingOrderByInput, skip?: Int, after?: String, before?: String, first?: Int, last?: Int }, info?: GraphQLResolveInfo | string) => Promise<Listing[]>
// ... other fields
}
export interface ListingWhereInput {
AND?: ListingWhereInput[] | ListingWhereInput
OR?: ListingWhereInput[] | ListingWhereInput
id?: ID_Input
id_not?: ID_Input
id_in?: ID_Input[] | ID_Input
id_not_in?: ID_Input[] | ID_Input
id_lt?: ID_Input
id_lte?: ID_Input
id_gt?: ID_Input
id_gte?: ID_Input
id_contains?: ID_Input
id_not_contains?: ID_Input
id_starts_with?: ID_Input
id_not_starts_with?: ID_Input
id_ends_with?: ID_Input
id_not_ends_with?: ID_Input
name?: String
name_not?: String
name_in?: String[] | String
name_not_in?: String[] | String
name_lt?: String
name_lte?: String
name_gt?: String
name_gte?: String
name_contains?: String
name_not_contains?: String
name_starts_with?: String
name_not_starts_with?: String
name_ends_with?: String
name_not_ends_with?: String
description?: String
description_not?: String
description_in?: String[] | String
description_not_in?: String[] | String
description_lt?: String
description_lte?: String
description_gt?: String
description_gte?: String
description_contains?: String
description_not_contains?: String
description_starts_with?: String
description_not_starts_with?: String
description_ends_with?: String
description_not_ends_with?: String
price?: Int
price_not?: Int
price_in?: Int[] | Int
price_not_in?: Int[] | Int
price_lt?: Int
price_lte?: Int
price_gt?: Int
price_gte?: Int
location?: String
location_not?: String
location_in?: String[] | String
location_not_in?: String[] | String
location_lt?: String
location_lte?: String
location_gt?: String
location_gte?: String
location_contains?: String
location_not_contains?: String
location_starts_with?: String
location_not_starts_with?: String
location_ends_with?: String
location_not_ends_with?: String
condition?: Condition
condition_not?: Condition
condition_in?: Condition[] | Condition
condition_not_in?: Condition[] | Condition
status?: Status
status_not?: Status
status_in?: Status[] | Status
status_not_in?: Status[] | Status
expiredAt?: DateTime
expiredAt_not?: DateTime
expiredAt_in?: DateTime[] | DateTime
expiredAt_not_in?: DateTime[] | DateTime
expiredAt_lt?: DateTime
expiredAt_lte?: DateTime
expiredAt_gt?: DateTime
expiredAt_gte?: DateTime
soldAt?: DateTime
soldAt_not?: DateTime
soldAt_in?: DateTime[] | DateTime
soldAt_not_in?: DateTime[] | DateTime
soldAt_lt?: DateTime
soldAt_lte?: DateTime
soldAt_gt?: DateTime
soldAt_gte?: DateTime
deletedAt?: DateTime
deletedAt_not?: DateTime
deletedAt_in?: DateTime[] | DateTime
deletedAt_not_in?: DateTime[] | DateTime
deletedAt_lt?: DateTime
deletedAt_lte?: DateTime
deletedAt_gt?: DateTime
deletedAt_gte?: DateTime
createdAt?: DateTime
createdAt_not?: DateTime
createdAt_in?: DateTime[] | DateTime
createdAt_not_in?: DateTime[] | DateTime
createdAt_lt?: DateTime
createdAt_lte?: DateTime
createdAt_gt?: DateTime
createdAt_gte?: DateTime
updatedAt?: DateTime
updatedAt_not?: DateTime
updatedAt_in?: DateTime[] | DateTime
updatedAt_not_in?: DateTime[] | DateTime
updatedAt_lt?: DateTime
updatedAt_lte?: DateTime
updatedAt_gt?: DateTime
updatedAt_gte?: DateTime
seller?: UserWhereInput
likes_every?: ListingLikeWhereInput
likes_some?: ListingLikeWhereInput
likes_none?: ListingLikeWhereInput
}
答案 0 :(得分：1)
问题是typescript不会推断对象文字属性的字符串文字类型，因此status in将被输入string而不是'ACTIVE'
您可以明确指定where的类型：
const where:ListingWhereInput = ..
或者您可以使用类型断言强制属性为字符串文字类型
{ status: 'ACTIVE' as 'ACTIVE'}