英文:
Creating user-defined keys in document
问题
我正在尝试创建一个具有用户定义键的文档，代码如下：
package main
import (
"fmt"
driver "github.com/arangodb/go-driver"
"github.com/arangodb/go-driver/http"
)
type doc struct {
_key string `json:"_key"`
}
func main() {
conn, _ := http.NewConnection(http.ConnectionConfig{
Endpoints: []string{"http://localhost:8529"},
})
c, _ := driver.NewClient(driver.ClientConfig{
Connection: conn,
Authentication: driver.BasicAuthentication("root", "test"),
})
db, _ := c.CreateDatabase(nil, "dbname", nil)
// delete the collection if it exists; then create it
options := &driver.CreateCollectionOptions{
KeyOptions: &driver.CollectionKeyOptions{
AllowUserKeys: true,
},
}
coll, _ := db.CreateCollection(nil, "collname", options)
meta, _ := coll.CreateDocument(nil, doc{_key: "mykey"})
fmt.Printf("Created document with key '%s' in collection '%s'\n", meta.Key, coll.Name())
}
我得到以下输出：
Created document with key '5439648' in collection 'collname'
我尝试过将doc类型的属性命名为_key、key和Key，但都没有成功。
英文:
I'm attempting to create a document with a user-defined key as follows:
package main
import (
"fmt"
driver "github.com/arangodb/go-driver"
"github.com/arangodb/go-driver/http"
)
type doc struct {
_key string `json:"_key"`
}
func main() {
conn, _ := http.NewConnection(http.ConnectionConfig{
Endpoints: []string{"http://localhost:8529"},
})
c, _ := driver.NewClient(driver.ClientConfig{
Connection: conn,
Authentication: driver.BasicAuthentication("root", "test"),
})
db, _ := c.CreateDatabase(nil, "dbname", nil)
// delete the collection if it exists; then create it
options := &driver.CreateCollectionOptions{
KeyOptions: &driver.CollectionKeyOptions{
AllowUserKeys: true,
},
}
coll, _ := db.CreateCollection(nil, "collname", options)
meta, _ := coll.CreateDocument(nil, doc{ _key: "mykey" })
fmt.Printf("Created document with key '%s' in collection '%s'\n", meta.Key, coll.Name())
}
I get the following output:
Created document with key '5439648' in collection 'collname'
I've tried with the property of the doc type as '_key', 'key' and 'Key'. None have worked.
答案1
得分: 6
字段需要可见（大写）才能包含在JSON编组中。
同时，数据库期望JSON文档包含一个_key属性。
所以你应该这样指定：
type doc struct {
Key string `json:"_key"`
}
或者，你可以尝试将一个map发送给该方法：
coll.CreateDocument(nil, map[string]string{"_key": "mykey"})
英文:
The field needs to be visible (so uppercase) in order to be included in the JSON marshalling.
At the same time, the DB expects the JSON document to contain a _key attribute.
So you should specify it as:
type doc struct {
Key string `json:"_key"`
}
Alternatively, you can try sending a map to the method:
coll.CreateDocument(nil, map[string]string{"_key": "mykey"})
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论