graphql-go：使用Object作為查詢的輸入參數

Question

我試圖將一個對象作為參數傳遞給查詢（而不是標量）。 從文檔看來，這應該是可能的，但我無法弄清楚如何使它工作。

我正在使用graphql-go，這是測試模式：

var fileDocumentType = graphql.NewObject(graphql.ObjectConfig{
Name: "FileDocument",
Fields: graphql.Fields{
    "id": &graphql.Field{
        Type: graphql.String,
        Resolve: func(p graphql.ResolveParams) (interface{}, error) {
            if fileDoc, ok := p.Source.(data_format.FileDocument); ok {
                return fileDoc.Id, nil
            }
            return "", nil
        },
    },
    "tags": &graphql.Field{
        Type: graphql.NewList(tagsDataType),
        Args: graphql.FieldConfigArgument{
            "tags": &graphql.ArgumentConfig{
                Type: tagsInputType,
            },
        },
        Resolve: func(p graphql.ResolveParams) (interface{}, error) {
            fmt.Println(p.Source)
            fmt.Println(p.Args)
            if fileDoc, ok := p.Source.(data_format.FileDocument); ok {
                return fileDoc.Tags, nil
            }
            return nil, nil
        },
    },

},
})

我試圖使用的輸入類型（我已嘗試過InputObject和標准對象）

var tagsInputType = graphql.NewInputObject(graphql.InputObjectConfig{
Name: "tagsInput",
Fields: graphql.Fields{
    "keyt": &graphql.Field{
        Type: graphql.String,
    },
    "valuet": &graphql.Field{
        Type: graphql.String,
    },
},
})

這是我用來測試的graphql查詢：

{
        list(location:"blah",rule:"blah")
        {
            id,tags(tags:{keyt:"test",valuet:"test"})
            {
                key,
                value
            },
            {
                datacentre,
                handlerData
                {
                    key,
                    value
                }
            }
        }
    }

我收到以下錯誤：

wrong result, unexpected errors: [Argument "tags" has invalid value {keyt: "test", valuet: "test"}.
In field "keyt": Unknown field.
In field "valuet": Unknown field.]

問題是，當我將類型更改為字符串時，它工作正常。 如何將對象用作輸入arg？

謝謝！

Answer 1

有同樣的問題。 這是我通過graphql-go源找到的內容。

InputObject的Fields必須是InputObjectConfigFieldMap或InputObjectConfigFieldMapThunk類型才能使pkg正常工作。

所以InputObject看起來像這樣：

var inputType = graphql.NewInputObject(
    graphql.InputObjectConfig{
        Name: "MyInputType",
        Fields: graphql.InputObjectConfigFieldMap{
            "key": &graphql.InputObjectFieldConfig{
                Type: graphql.String,
            },
        },
    },
) 

---

修改了Hello World示例以獲取Input Object ：

package main

import (
    "encoding/json"
    "fmt"
    "log"

    "github.com/graphql-go/graphql"
)

func main() {
    // Schema

    var inputType = graphql.NewInputObject(
        graphql.InputObjectConfig{
            Name: "MyInputType",
            Fields: graphql.InputObjectConfigFieldMap{
                "key": &graphql.InputObjectFieldConfig{
                    Type: graphql.String,
                },
            },
        },
    )

    args := graphql.FieldConfigArgument{
        "foo": &graphql.ArgumentConfig{
            Type: inputType,
        },
    }

    fields := graphql.Fields{
        "hello": &graphql.Field{
            Type: graphql.String,
            Args: args,
            Resolve: func(p graphql.ResolveParams) (interface{}, error) {
                fmt.Println(p.Args)
                return "world", nil
            },
        },
    }
    rootQuery := graphql.ObjectConfig{
        Name:   "RootQuery",
        Fields: fields,
    }

    schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
    schema, err := graphql.NewSchema(schemaConfig)
    if err != nil {
        log.Fatalf("failed to create new schema, error: %v", err)
    }

    // Query
    query := `
        {
            hello(foo:{key:"blah"})
        }
    `
    params := graphql.Params{Schema: schema, RequestString: query}
    r := graphql.Do(params)
    if len(r.Errors) > 0 {
        log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)
    }
    rJSON, _ := json.Marshal(r)
    fmt.Printf("%s \n", rJSON) // {“data”:{“hello”:”world”}}
}