Query WordPress 数据指令
指令
指令通过 Gato GraphQL 扩展提供。以下是其中几个示例。
操作指令
通过 @depends 创建操作管道,并通过 @skip 和 @include 根据某个动态值有条件地执行其中一个操作:
query CheckIfPostExists($id: ID!) {
# Initialize the dynamic variable to `false`
postExists: _echo(value: false)
@export(as: "postExists")
post(by: { id: $id }) {
# Found the Post => Set dynamic variable to `true`
postExists: _echo(value: true)
@export(as: "postExists")
}
}
mutation ExecuteOnlyIfPostExists
@depends(on: "CheckIfPostExists")
@include(if: $postExists)
{
# Do something...
}字段指令
通过 @strLowerCase 将字段转换为小写:
{
posts(pagination: { limit: 3 }) {
id
title @strLowerCase
}
}通过 @default 为字段提供默认值:
query GetFeaturedImages {
posts(pagination: { limit: 10 }) {
id
title
hasFeaturedImage
featuredImage @default(value: 1505) {
id
src
}
}
}通过 @remove 从响应中移除字段输出:
query GetFeaturedImages {
posts(pagination: { limit: 10 }) {
id
title
hasFeaturedImage
featuredImage @remove(condition: IS_NULL) {
src
}
sourceFeaturedImage: featuredImage {
src
}
}
}通过 @passOnwards 和 @applyFunction 将 function field 应用于某个字段值:
{
posts {
id
hasComments
notHasComments: hasComments
@passOnwards(as: "postHasComments")
@applyFunction(
name: "_not"
arguments: {
value: $postHasComments
},
setResultInResponse: true
)
}
}Prev