Exemple #1
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// Load a datastore value into a model and add the key
func GetModel(ctx appengine.Context, key *datastore.Key, model models.Model) error {
	err := datastore.Get(ctx, key, model)
	if err == nil {
		model.SetKey(key)
	}
	return err
}
Exemple #2
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// Call the parent Next and set the model's key
func (iterator *ModelIterator) Next(destModel models.Model) (*datastore.Key, error) {
	modelKey, err := iterator.Iterator.Next(destModel)
	if err == nil {
		destModel.SetKey(modelKey)
	}
	return modelKey, err
}
Exemple #3
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// Load multiple datastore values into a slice of models
func GetModels(ctx appengine.Context, keys []*datastore.Key, modelSlice []models.Model) error {
	err := datastore.GetMulti(ctx, keys, modelSlice)
	var (
		index int
		model models.Model
	)
	for index, model = range modelSlice {
		model.SetKey(keys[index])
	}
	return err
}
Exemple #4
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// Store a Model, and call SetKey after generating its key (if it doesn't
// have one already).
func PutModel(ctx appengine.Context, model models.Model) error {
	modelKey, err := model.Key()
	if err == models.NoKeyLoaded {
		modelKey = datastore.NewIncompleteKey(ctx, model.Kind(), nil)
	} else if err != nil {
		panic(err)
	}
	key, err := datastore.Put(ctx, modelKey, model)
	if err == nil {
		model.SetKey(key)
	}
	return err
}