如何进行变异查询以在 GraphQL 中插入(数组)字段列表
How to make a mutation query for inserting a list of (Array) fields in GraphQL
最近我开始研究 GraphQL,我能够毫无问题地在平面模式中插入数据,但是当涉及到数据数组时,我收到类似
的错误
{ "errors": [ { "message": "Must be input type" } ]}
我正在使用邮递员测试我的查询,我的变异查询是
mutation M {
AddEvent
(
title: "Birthday event"
description:"Welcome to all"
media:[{url:"www.google.com", mediaType:"image" }]
location:[{address:{state:"***", city:"****"}}]
)
{title,description,media,location,created,_id}}
这是我的事件架构:
EventType = new GraphQLObjectType({
name: 'Event',
description: 'A Event',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of location',
}
})
});
// Media Type
export var mediaType = new GraphQLObjectType({
name: 'Media',
description: 'A Media',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
url:{
type: GraphQLString,
description: 'The url of the event.',
},
mediaType:{
type: GraphQLString,
description: 'The mediaTypa of the event.',
}
})
});
// Location Type
export var locationType = new GraphQLObjectType({
name: 'Location',
description: 'A location',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
address:{
type: GraphQLString,
description: 'The address.',
},
state:{
type: GraphQLString,
description: 'The state.',
},
city:{
type: GraphQLString,
description: 'The city.',
},
zip:{
type: GraphQLString,
description: 'The zip code.',
},
country:{
type: GraphQLString,
description: 'The country.',
}
})
});
猫鼬模式:
var EventSchema = new mongoose.Schema({
title: {
required: true,
type: String,
trim: true,
match: /^([\w ,.!?]{1,100})$/
},
description: {
required: false,
type: String,
trim: true,
match: /^([\w ,.!?]{1,100})$/
},
media: [{
url: {
type: String,
trim: true
},
mediaType: {
type: String,
trim: true
}
}],
location: [{
address: {
type: String
},
city: {
type: String
},
state: {
type: String
},
zip: {
type: String
},
country: {
type: String
}
}]
})
突变类型:
addEvent: {
type: EventType,
args: {
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
created: {
type: GraphQLInt,
description: 'The created of the user.',
}
},
resolve: (obj, {title,description,media,location,created,_id}) => {
let toCreateEvent = {
title,
description,
created:new Date(),
start: new Date(),
media,
location,
_id,
};
return mongo()
.then(db => {
return new Promise(
function(resolve,reject){
let collection = db.collection('events');
collection.insert(toCreateEvent, (err, result) => {
db.close();
if (err) {
reject(err);
return;
}
resolve(result);
});
})
});
}
}
您的问题是,当您定义突变时,所有类型都必须是输入类型,因此您会得到错误 "Must be input type"
。所以在这里(来自你的突变):
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
GraphQLList
、mediaType
和 locationType
必须是输入类型。
GraphQLList
已经是输入类型(请参阅此处 https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82 以查看被视为输入类型的 GraphQL 类型列表)。
然而你的类型 mediaType
和 locationType
是 GraphQLObjectType
类型,这不是输入类型但是如果你再次查看输入类型列表: https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82, 你会发现 GraphQLInputObjectType
是一个对象输入类型,所以,你需要做的是将 mediaType
和 locationType
替换为它们的 "input" 版本。
我建议做的是创建 mediaInputType
和 locationInputType
,它们与 mediaType
和 locationType
具有相同的字段结构,但使用 [=26= 创建] 而不是 new GraphQLObjectType({...
并在你的突变中使用它们。
我运行遇到了同样的问题,我就是这样解决的,如果您有任何问题,请随时发表评论。
我 运行 遇到了同样的问题 - 我不知道如何在输入定义中指定对象数组。因此,对于那些想要查看 "text" 模式解决方案的人:
type Book {
title: String!
}
在您的输入类型中包含一组书籍
input AuthorInput {
name: String!
age: Int!
}
你不能只在输入语句中添加 books: [Book!]
,你需要特意创建包含所需字段的输入类型(如果你愿意,可以重复):
input BookInput {
title: String!
}
然后您可以:
input AuthorInput {
name: String!
age: Int!
books: [BookInput!]
}
最近我开始研究 GraphQL,我能够毫无问题地在平面模式中插入数据,但是当涉及到数据数组时,我收到类似
的错误 { "errors": [ { "message": "Must be input type" } ]}
我正在使用邮递员测试我的查询,我的变异查询是
mutation M {
AddEvent
(
title: "Birthday event"
description:"Welcome to all"
media:[{url:"www.google.com", mediaType:"image" }]
location:[{address:{state:"***", city:"****"}}]
)
{title,description,media,location,created,_id}}
这是我的事件架构:
EventType = new GraphQLObjectType({
name: 'Event',
description: 'A Event',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of location',
}
})
});
// Media Type
export var mediaType = new GraphQLObjectType({
name: 'Media',
description: 'A Media',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
url:{
type: GraphQLString,
description: 'The url of the event.',
},
mediaType:{
type: GraphQLString,
description: 'The mediaTypa of the event.',
}
})
});
// Location Type
export var locationType = new GraphQLObjectType({
name: 'Location',
description: 'A location',
fields: () => ({
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
address:{
type: GraphQLString,
description: 'The address.',
},
state:{
type: GraphQLString,
description: 'The state.',
},
city:{
type: GraphQLString,
description: 'The city.',
},
zip:{
type: GraphQLString,
description: 'The zip code.',
},
country:{
type: GraphQLString,
description: 'The country.',
}
})
});
猫鼬模式:
var EventSchema = new mongoose.Schema({
title: {
required: true,
type: String,
trim: true,
match: /^([\w ,.!?]{1,100})$/
},
description: {
required: false,
type: String,
trim: true,
match: /^([\w ,.!?]{1,100})$/
},
media: [{
url: {
type: String,
trim: true
},
mediaType: {
type: String,
trim: true
}
}],
location: [{
address: {
type: String
},
city: {
type: String
},
state: {
type: String
},
zip: {
type: String
},
country: {
type: String
}
}]
})
突变类型:
addEvent: {
type: EventType,
args: {
_id: {
type: GraphQLString,
description: 'The id of the event.',
},
title: {
type: GraphQLString,
description: 'The title of the event.',
},
description: {
type: GraphQLString,
description: 'The description of the event.',
},
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
created: {
type: GraphQLInt,
description: 'The created of the user.',
}
},
resolve: (obj, {title,description,media,location,created,_id}) => {
let toCreateEvent = {
title,
description,
created:new Date(),
start: new Date(),
media,
location,
_id,
};
return mongo()
.then(db => {
return new Promise(
function(resolve,reject){
let collection = db.collection('events');
collection.insert(toCreateEvent, (err, result) => {
db.close();
if (err) {
reject(err);
return;
}
resolve(result);
});
})
});
}
}
您的问题是,当您定义突变时,所有类型都必须是输入类型,因此您会得到错误 "Must be input type"
。所以在这里(来自你的突变):
media:{
type:new GraphQLList(mediaType),
description:'List of media',
},
location:{
type:new GraphQLList(locationType),
description:'List of media',
},
GraphQLList
、mediaType
和 locationType
必须是输入类型。
GraphQLList
已经是输入类型(请参阅此处 https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82 以查看被视为输入类型的 GraphQL 类型列表)。
然而你的类型 mediaType
和 locationType
是 GraphQLObjectType
类型,这不是输入类型但是如果你再次查看输入类型列表: https://github.com/graphql/graphql-js/blob/master/src/type/definition.js#L74-L82, 你会发现 GraphQLInputObjectType
是一个对象输入类型,所以,你需要做的是将 mediaType
和 locationType
替换为它们的 "input" 版本。
我建议做的是创建 mediaInputType
和 locationInputType
,它们与 mediaType
和 locationType
具有相同的字段结构,但使用 [=26= 创建] 而不是 new GraphQLObjectType({...
并在你的突变中使用它们。
我运行遇到了同样的问题,我就是这样解决的,如果您有任何问题,请随时发表评论。
我 运行 遇到了同样的问题 - 我不知道如何在输入定义中指定对象数组。因此,对于那些想要查看 "text" 模式解决方案的人:
type Book {
title: String!
}
在您的输入类型中包含一组书籍
input AuthorInput {
name: String!
age: Int!
}
你不能只在输入语句中添加 books: [Book!]
,你需要特意创建包含所需字段的输入类型(如果你愿意,可以重复):
input BookInput {
title: String!
}
然后您可以:
input AuthorInput {
name: String!
age: Int!
books: [BookInput!]
}