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attribute.go
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attribute.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package store
// Attribute model.
type Attribute struct {
ID string `gorm:"type:UUID;primary_key;default:gen_random_uuid()"`
EntityID string `gorm:"type:UUID;index:attribute_entity_index;not null"`
EntityType string `gorm:"type:VARCHAR(32);index:attribute_entity_index;not null"`
Key string `gorm:"type:VARCHAR"`
Value string `gorm:"type:VARCHAR"`
}
func init() {
registerModel(&Attribute{})
}
type attributes []Attribute
func (a attributes) toMap() map[string]string {
attributes := make(map[string]string, len(a))
for _, attr := range a {
attributes[attr.Key] = attr.Value
}
return attributes
}
func (a attributes) updateFromMap(m map[string]string) attributes {
type attribute struct {
Attribute
deleted bool
}
attributes := make(map[string]*attribute)
for _, existing := range a {
attributes[existing.Key] = &attribute{
Attribute: existing,
deleted: true,
}
}
var updated []Attribute
for k, v := range m {
if existing, ok := attributes[k]; ok {
existing.deleted = false
existing.Value = v
} else {
updated = append(updated, Attribute{Key: k, Value: v})
}
}
for _, existing := range attributes {
if existing.deleted {
continue
}
updated = append(updated, existing.Attribute)
}
return updated
}