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client.go
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client.go
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package ds
import (
"context"
"log"
"os"
"time"
"cloud.google.com/go/datastore"
"google.golang.org/api/iterator"
)
var projectID = os.Getenv("GOOGLE_CLOUD_PROJECT")
var ctx = context.Background()
var client, _ = datastore.NewClient(ctx, projectID)
type GuestEntity struct {
Name string `datastore:"author"`
Message string `datastore:"message"`
Created time.Time `datastore:"created"`
Key *datastore.Key `datastore:"__key__"`
}
type CommentEntity struct {
Message string `datastore:"message"`
Created time.Time `datastore:"created"`
Key *datastore.Key `datastore:"__key__"`
}
func Insert(author, message string) GuestEntity {
key := datastore.IncompleteKey("Greeting", nil)
data := GuestEntity{
Name: author,
Message: message,
Created: time.Now(),
}
key, err := client.Put(ctx, key, &data)
if err != nil {
log.Fatalf("Failed to store data: %v", err)
}
data.Key = key
return data
}
func GetAll() []GuestEntity {
entities := []GuestEntity{}
query := datastore.NewQuery("Greeting").Order("-created")
it := client.Run(ctx, query)
for {
var entity GuestEntity
_, err := it.Next(&entity)
if err == iterator.Done {
break
}
if err != nil {
log.Fatalf("Error fetching next entity: %v", err)
}
entities = append(entities, entity)
}
return entities
}
func GetByID(id int64) GuestEntity {
key := datastore.IDKey("Greeting", id, nil)
query := datastore.NewQuery("Greeting").Filter("__key__ =", key)
it := client.Run(ctx, query)
var entity GuestEntity
_, err := it.Next(&entity)
if err != iterator.Done && err != nil {
log.Fatalf("Error fetching next entity: %v", err)
}
return entity
}
func Update(entity GuestEntity) GuestEntity {
_, err := client.Put(ctx, entity.Key, &entity)
if err != nil {
log.Fatalf("Failed to store data: %v", err)
}
return entity
}