Changeset mutator for REL. Changesets allow filtering, casting, validation and definition of constraints when manipulating structs.
go get github.com/Fs02/changeset
package main
import (
"time"
"github.com/Fs02/rel"
"github.com/Fs02/rel/adapter/mysql"
"github.com/Fs02/changeset"
"github.com/Fs02/changeset/params"
)
type Product struct {
ID int
Name string
Price int
CreatedAt time.Time
UpdatedAt time.Time
}
// ChangeProduct prepares data before database operation.
// Such as casting value to appropriate types and perform validations.
func ChangeProduct(product interface{}, params params.Params) *changeset.Changeset {
ch := changeset.Cast(product, params, []string{"name", "price"})
changeset.ValidateRequired(ch, []string{"name", "price"})
changeset.ValidateMin(ch, "price", 100)
return ch
}
func main() {
// initialize mysql adapter.
adapter, _ := mysql.Open(dsn)
defer adapter.Close()
// initialize rel's repo.
repo := rel.New(adapter)
var product Product
// Inserting Products.
// Changeset is used when creating or updating your data.
ch := ChangeProduct(product, params.Map{
"name": "shampoo",
"price": 1000,
})
if ch.Error() != nil {
// handle error
}
// Changeset can also be created directly from json string.
jsonch := ChangeProduct(product, params.ParseJSON(`{
"name": "soap",
"price": 2000,
}`))
// Create products with changeset and return the result to &product,
if err := repo.Insert(context.TODO(), &product, ch); err != nil {
// handle error
}
}
Released under the MIT License