处理字段

api/graphql.go

@@ -93,6 +93,7 @@ func NewSchema() (graphql.Schema, error) {
 				"rank":        &graphql.ArgumentConfig{Type: graphql.String},
 				"create_time": &graphql.ArgumentConfig{Type: graphql.DateTime},
 				"update_time": &graphql.ArgumentConfig{Type: graphql.DateTime},
+				"text":        &graphql.ArgumentConfig{Type: graphql.String},                    // 查找图像中的文字
 				"first":       &graphql.ArgumentConfig{Type: graphql.Int, DefaultValue: 10},     // 翻页参数
 				"after":       &graphql.ArgumentConfig{Type: graphql.String, DefaultValue: "0"}, // 翻页参数
 			},
@@ -102,17 +103,20 @@ func NewSchema() (graphql.Schema, error) {
 				for _, field := range requestedFields {
 					fieldAST, ok := field.(*ast.Field)
 					if ok {
-						if fieldAST.Name.Value == "list" {
+						switch fieldAST.Name.Value {
+						case "list":
 							for _, field := range fieldAST.SelectionSet.Selections {
 								fieldAST, ok := field.(*ast.Field)
 								if ok {
 									fields = append(fields, fieldAST.Name.Value)
 								}
 							}
-						} else if fieldAST.Name.Value == "next" {
+						case "next":
 							fmt.Println("next")
-						} else {
-							fields = append(fields, fieldAST.Name.Value)
+						case "text":
+							fmt.Println("text")
+						default:
+							fmt.Println(fieldAST.Name.Value)
 						}
 					}
 				}
@@ -194,23 +198,25 @@ func NewSchema() (graphql.Schema, error) {
 				for _, field := range requestedFields {
 					fieldAST, ok := field.(*ast.Field)
 					if ok {
-						if fieldAST.Name.Value == "list" {
+						switch fieldAST.Name.Value {
+						case "list":
 							for _, field := range fieldAST.SelectionSet.Selections {
 								fieldAST, ok := field.(*ast.Field)
 								if ok {
-									if fieldAST.Name.Value == "user" {
+									switch fieldAST.Name.Value {
+									case "user":
 										fields = append(fields, "user_id")
-									} else if fieldAST.Name.Value == "article" {
+									case "article":
 										fields = append(fields, "article_id")
-									} else {
+									default:
 										fields = append(fields, fieldAST.Name.Value)
 									}
 								}
 							}
-						} else if fieldAST.Name.Value == "next" {
+						case "next":
 							fmt.Println("next")
-						} else {
-							fields = append(fields, fieldAST.Name.Value)
+						default:
+							fmt.Println(fieldAST.Name.Value)
 						}
 					}
 				}

api/struct.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"reflect"
 	"time"
 )
 
@@ -19,8 +20,8 @@ type Image struct {
 	CollectCount         int       `json:"collect_count"           db:"collect_count"`
 	ArticleID            int       `json:"article_id"              db:"article_id"`
 	UserID               int       `json:"user_id"                 db:"user_id"`
-	User                 User      `json:"user"                    db:"user"`
-	Article              Article   `json:"article"                 db:"article"`
+	User                 User      `json:"user"                    db:"-"`
+	Article              Article   `json:"article"                 db:"-"`
 	CreateTime           time.Time `json:"create_time"             db:"create_time"`
 	UpdateTime           time.Time `json:"update_time"             db:"update_time"`
 }
@@ -41,3 +42,40 @@ type Article struct {
 	CreateTime time.Time `json:"create_time" db:"create_time"`
 	UpdateTime time.Time `json:"update_time" db:"update_time"`
 }
+
+// 利用反射获取每个结构体所有字段
+func getFields(s interface{}) (fields []string) {
+	t := reflect.TypeOf(s)
+	for i := 0; i < t.NumField(); i++ {
+		fields = append(fields, t.Field(i).Name)
+	}
+	return fields
+}
+
+// 检查字段是否存在
+func checkFields(fields []string, fields_list []string) bool {
+	for _, field := range fields {
+		if !contains(fields_list, field) {
+			return false
+		}
+	}
+	return true
+}
+
+// 判断字符串是否存在于字符串数组中
+func contains(s []string, e string) bool {
+	for _, v := range s {
+		if v == e {
+			return true
+		}
+	}
+	return false
+}
+
+func QueryUserList(fields []string) (user_list []User) {
+	if !checkFields(fields, getFields(User{})) {
+		return
+	}
+
+	return
+}