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mongox-go-driver/mongox/database/deletearray.go

59 lines
1.5 KiB

package database
import (
"fmt"
"reflect"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo/options"
"github.com/mainnika/mongox-go-driver/v2/mongox/base"
)
// DeleteArray removes documents list from a database by their ids
func (d *Database) DeleteArray(target interface{}) (err error) {
targetV := reflect.ValueOf(target)
targetT := targetV.Type()
targetK := targetV.Kind()
if targetK != reflect.Ptr {
panic(fmt.Errorf("target is not a ptr"))
}
targetSliceV := targetV.Elem()
targetSliceT := targetT.Elem()
if targetSliceT.Kind() != reflect.Slice {
panic(fmt.Errorf("target should be a ptr to a slice"))
}
targetSliceElemT := targetSliceT.Elem()
if targetSliceElemT.Kind() != reflect.Ptr {
panic(fmt.Errorf("target slice should contain ptrs"))
}
zeroElem := reflect.Zero(targetSliceElemT)
targetLen := targetSliceV.Len()
collection := d.GetCollectionOf(zeroElem.Interface())
opts := options.Delete()
ids := primitive.A{}
for i := 0; i < targetLen; i++ {
elem := targetSliceV.Index(i)
ids = append(ids, base.GetID(elem.Interface()))
}
if len(ids) == 0 {
return fmt.Errorf("can't delete zero elements")
}
result, err := collection.DeleteMany(d.Context(), primitive.M{"_id": primitive.M{"$in": ids}}, opts)
if err != nil {
return
}
if result.DeletedCount != int64(targetLen) {
err = fmt.Errorf("can't verify delete result: removed count mismatch %d != %d", result.DeletedCount, targetLen)
}
return
}