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Finish Scan support

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This commit is contained in:
Jinzhu 2020-05-26 21:30:17 +08:00
parent c299cb8db6
commit 51c5be0503
3 changed files with 57 additions and 11 deletions
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4
callbacks/query.go
View File

@ -90,7 +90,11 @@ func Query(db *gorm.DB) {
db.Statement.AddClauseIfNotExists(clause.From{})
}
if len(clauseSelect.Columns) > 0 {
db.Statement.AddClause(clauseSelect)
} else {
db.Statement.AddClauseIfNotExists(clauseSelect)
}
db.Statement.Build("SELECT", "FROM", "WHERE", "GROUP BY", "ORDER BY", "LIMIT", "FOR")
}

22
finisher_api.go
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@ -48,7 +48,7 @@ func (db *DB) Save(value interface{}) (tx *DB) {
}
// First find first record that match given conditions, order by primary key
func (db *DB) First(out interface{}, conds ...interface{}) (tx *DB) {
func (db *DB) First(dest interface{}, conds ...interface{}) (tx *DB) {
tx = db.getInstance().Limit(1).Order(clause.OrderByColumn{
Column: clause.Column{Table: clause.CurrentTable, Name: clause.PrimaryKey},
})
@ -56,25 +56,25 @@ func (db *DB) First(out interface{}, conds ...interface{}) (tx *DB) {
tx.Statement.AddClause(clause.Where{Exprs: tx.Statement.BuildCondtion(conds[0], conds[1:]...)})
}
tx.Statement.RaiseErrorOnNotFound = true
tx.Statement.Dest = out
tx.Statement.Dest = dest
tx.callbacks.Query().Execute(tx)
return
}
// Take return a record that match given conditions, the order will depend on the database implementation
func (db *DB) Take(out interface{}, conds ...interface{}) (tx *DB) {
func (db *DB) Take(dest interface{}, conds ...interface{}) (tx *DB) {
tx = db.getInstance().Limit(1)
if len(conds) > 0 {
tx.Statement.AddClause(clause.Where{Exprs: tx.Statement.BuildCondtion(conds[0], conds[1:]...)})
}
tx.Statement.RaiseErrorOnNotFound = true
tx.Statement.Dest = out
tx.Statement.Dest = dest
tx.callbacks.Query().Execute(tx)
return
}
// Last find last record that match given conditions, order by primary key
func (db *DB) Last(out interface{}, conds ...interface{}) (tx *DB) {
func (db *DB) Last(dest interface{}, conds ...interface{}) (tx *DB) {
tx = db.getInstance().Limit(1).Order(clause.OrderByColumn{
Column: clause.Column{Table: clause.CurrentTable, Name: clause.PrimaryKey},
Desc: true,
@ -83,28 +83,28 @@ func (db *DB) Last(out interface{}, conds ...interface{}) (tx *DB) {
tx.Statement.AddClause(clause.Where{Exprs: tx.Statement.BuildCondtion(conds[0], conds[1:]...)})
}
tx.Statement.RaiseErrorOnNotFound = true
tx.Statement.Dest = out
tx.Statement.Dest = dest
tx.callbacks.Query().Execute(tx)
return
}
// Find find records that match given conditions
func (db *DB) Find(out interface{}, conds ...interface{}) (tx *DB) {
func (db *DB) Find(dest interface{}, conds ...interface{}) (tx *DB) {
tx = db.getInstance()
if len(conds) > 0 {
tx.Statement.AddClause(clause.Where{Exprs: tx.Statement.BuildCondtion(conds[0], conds[1:]...)})
}
tx.Statement.Dest = out
tx.Statement.Dest = dest
tx.callbacks.Query().Execute(tx)
return
}
func (db *DB) FirstOrInit(out interface{}, where ...interface{}) (tx *DB) {
func (db *DB) FirstOrInit(dest interface{}, where ...interface{}) (tx *DB) {
tx = db.getInstance()
return
}
func (db *DB) FirstOrCreate(out interface{}, where ...interface{}) (tx *DB) {
func (db *DB) FirstOrCreate(dest interface{}, where ...interface{}) (tx *DB) {
tx = db.getInstance()
return
}
@ -181,6 +181,8 @@ func (db *DB) Rows() (*sql.Rows, error) {
// Scan scan value to a struct
func (db *DB) Scan(dest interface{}) (tx *DB) {
tx = db.getInstance()
tx.Statement.Dest = dest
tx.callbacks.Query().Execute(tx)
return
}

40
tests/scan_test.go Normal file
View File

@ -0,0 +1,40 @@
package tests_test
import (
"testing"
. "github.com/jinzhu/gorm/tests"
)
func TestScan(t *testing.T) {
user1 := User{Name: "ScanUser1", Age: 1}
user2 := User{Name: "ScanUser2", Age: 10}
user3 := User{Name: "ScanUser3", Age: 20}
DB.Save(&user1).Save(&user2).Save(&user3)
type result struct {
Name string
Age int
}
var res result
DB.Table("users").Select("name, age").Where("id = ?", user3.ID).Scan(&res)
if res.Name != user3.Name || res.Age != int(user3.Age) {
t.Errorf("Scan into struct should work")
}
var doubleAgeRes = &result{}
if err := DB.Debug().Table("users").Select("age + age as age").Where("id = ?", user3.ID).Scan(&doubleAgeRes).Error; err != nil {
t.Errorf("Scan to pointer of pointer")
}
if doubleAgeRes.Age != int(res.Age)*2 {
t.Errorf("Scan double age as age, expect: %v, got %v", res.Age*2, doubleAgeRes.Age)
}
var ress []result
DB.Table("users").Select("name, age").Where("id in ?", []uint{user2.ID, user3.ID}).Scan(&ress)
if len(ress) != 2 || ress[0].Name != user2.Name || ress[1].Name != user3.Name {
t.Errorf("Scan into struct map")
}
}