Gosto
Google Cloud Datastore Client Wrapper in Go, for automation of key attachment.
For example, inside of GKE container, you can access to datastore API of you're authorized with Service Account.
Table of Contents
Supported API
- Get
- GetMulti
- Delete
- DeleteMulti
- Put
- PutMulti
- RunInTransaction
Using the library
Quick Start
A client of gosto can be used with context.Context and Google Cloud Platform's project-id.
client, err := gosto.NewGosto(ctx, "project-id")
Get
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
user := &User{
ID: 1,
}
if err = client.Get(user); err != nil {
...
}
GetMulti
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
users := []*User{
&User{
ID: 1,
},
&User{
ID: 2,
},
}
if err = client.GetMulti(users); err != nil {
...
}
Delete
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
user := &User{
ID: 1,
...
}
key := client.Key(user)
if err = client.Delete(key); err != nil {
...
}
DeleteMulti
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
users := []*User{
&User{
ID: 1,
},
&User{
ID: 2,
},
}
var keys []*datastore.Key
for i := range users {
user := users[i]
keys = append(keys, client.Key(user))
}
if err = client.DeleteMulti(keys); err != nil {
...
}
Put
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
user := &User{
Name: "John Doe",
}
if key, err = client.Put(user); err != nil {
...
}
PutMulti
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
users := []*User{
&User{
Name: "John Doe",
},
&User{
Name: "Jane Doe",
},
}
if keys, err = client.PutMulti(users); err != nil {
...
}
RunInTransaction
client, err := gosto.NewGosto(ctx, "project-id")
if err != nil {
...
}
if err = client.RunInTransaction(func(tx *datastore.Transaction) error {
user := &User{
Name: "John Doe",
}
uKey := client.Key(user)
if err := tx.Put(uKey, user); err != nil && err != datastore.ErrNoSuchEntity {
return err
}
prof := &UserProfile{
UserID: user.ID,
Content: "HogeFuga",
}
pKey := client.Key(prof)
if _, err := tx.Put(pKey, prof); err != nil {
return err
}
return nil
})