Golang Result.Remove方法代码示例

func (self *Dh) RemoveForeverByConditions(conditions interface{}) api.Err {
	var res db.Result
	var errs api.Err
	res = Collection.Find(conditions)
	exist, err := res.Count()

	if exist == 0 {
		errs.Push(api.Msg{
			Field: "Delete: ",
			Error: api.ErrNoSuchRow,
		})
		return errs
	}

	err = res.Remove()

	if err == nil {
		return errs
	} else {
		errs.Push(api.Msg{
			Field: "Database delete  error: ",
			Error: err.Error(),
		})
	}
	return errs
}

func (self *Dh) Delete() api.Err {

	var res db.Result
	var errs api.Err

	id := reflect.ValueOf(self.Model).Elem().FieldByName("Id").Interface().(int64)
	res = Collection.Find(db.Cond{"id": id})
	exist, err := res.Count()

	if exist == 0 {
		errs.Push(api.Msg{
			Field: "Delete: ",
			Error: api.ErrNoSuchRow,
		})
		return errs
	}

	err = res.Remove()

	if err == nil {
		return errs
	} else {
		errs.Push(api.Msg{
			Field: "Database delete  error: ",
			Error: err.Error(),
		})
	}

	return errs
}

// Attempts to delete previously added rows.
func TestRemove(t *testing.T) {
	var err error
	var res db.Result
	var sess db.Database
	var artist db.Collection

	if sess, err = db.Open(Adapter, settings); err != nil {
		t.Fatal(err)
	}

	defer sess.Close()

	if artist, err = sess.Collection("artist"); err != nil {
		t.Fatal(err)
	}

	// Getting the artist with id = 1
	res = artist.Find(db.Cond{"id": 1})

	// Trying to remove the row.
	if err = res.Remove(); err != nil {
		t.Fatal(err)
	}
}

//.........这里部分代码省略.........

			// Find() with range
			res = col.Find(
				// 5, 6, 7, 3
				db.Or{
					db.And{
						db.Cond{"input >=": 5},
						db.Cond{"input <=": 7},
					},
					db.Cond{"input": 3},
				},
			).Sort("-input")

			if total, err = res.Count(); err != nil {
				t.Fatalf(`%s: %q`, wrapper, err)
			}

			if total != 4 {
				t.Fatalf(`Expecting a count of 4.`)
			}

			// Skipping.
			res = res.Skip(1).Limit(2)

			for {
				var item fibonacci
				err = res.Next(&item)
				if err == nil {
					switch item.Input {
					case 5:
					case 6:
						if fib(item.Input) != item.Output {
							t.Fatalf(`Unexpected value in item with wrapper %s.`, wrapper)
						}
					default:
						t.Fatalf(`Unexpected item: %v with wrapper %s.`, item, wrapper)
					}
				} else if err == db.ErrNoMoreRows {
					break
				} else {
					t.Fatalf(`%s: %q`, wrapper, err)
				}
			}

			if err = res.Remove(); err != nil {
				t.Fatalf(`%s: %q`, wrapper, err)
			}

			if total, err = res.Count(); err != nil {
				t.Fatalf(`%s: %q`, wrapper, err)
			}

			if total != 0 {
				t.Fatalf(`%s: Unexpected count %d.`, wrapper, total)
			}

			res = col.Find()

			total, err = res.Count()

			if total != 6 {
				t.Fatalf(`%s: Unexpected count %d.`, wrapper, total)
			}

			var items []fibonacci
			err = res.All(&items)

			if err != nil {
				t.Fatalf(`%s: %q`, wrapper, err)
			}

			for _, item := range items {
				switch item.Input {
				case 0:
				case 1:
				case 2:
				case 4:
				case 8:
				case 9:
					if fib(item.Input) != item.Output {
						t.Fatalf(`Unexpected value in item with wrapper %s.`, wrapper)
					}
				default:
					t.Fatalf(`Unexpected item: %v with wrapper %s.`, item, wrapper)
				}
			}

			err = res.Close()
			if err != nil {
				t.Errorf("Failed to close result %s: %q.", wrapper, err)
			}

			err = sess.Close()
			if err != nil {
				t.Errorf("Failed to close %s: %q.", wrapper, err)
			}

		}
	}
}

//.........这里部分代码省略.........
				}
			}

			var id interface{}

			if id, err = col.Append(controlItem); err != nil {
				t.Fatalf(`Could not append item with wrapper %s: %q`, wrapper, err)
			}

			var res db.Result
			switch wrapper {
			case `mongo`:
				res = col.Find(db.Cond{"_id": id.(bson.ObjectId)})
			case `ql`:
				res = col.Find(db.Cond{"id()": id})
			default:
				res = col.Find(db.Cond{"id": id})
			}

			var total uint64
			total, err = res.Count()

			if total != 1 {
				t.Fatalf("%s: Expecting one row.", wrapper)
			}

			// No support for Marshaler and Unmarshaler is implemeted for QL and
			// MongoDB.
			if wrapper == `ql` || wrapper == `mongo` {
				continue
			}

			var testItem birthday
			err = res.One(&testItem)
			if err != nil {
				t.Fatalf("%s One(): %s", wrapper, err)
			}

			if reflect.DeepEqual(testItem, controlItem) == false {
				t.Errorf("%s: testItem: %v (ts: %v)\n", wrapper, testItem, testItem.BornUT.value.Unix())
				t.Errorf("%s: controlItem: %v (ts: %v)\n", wrapper, controlItem, controlItem.BornUT.value.Unix())
				t.Fatalf("%s: Structs are different", wrapper)
			}

			var testItems []birthday
			err = res.All(&testItems)
			if err != nil {
				t.Fatalf("%s All(): %s", wrapper, err)
			}

			if len(testItems) == 0 {
				t.Fatalf("%s All(): Expecting at least one row.", wrapper)
			}

			for _, testItem = range testItems {
				if reflect.DeepEqual(testItem, controlItem) == false {
					t.Errorf("%s: testItem: %v\n", wrapper, testItem)
					t.Errorf("%s: controlItem: %v\n", wrapper, controlItem)
					t.Fatalf("%s: Structs are different", wrapper)
				}
			}

			controlItem.Name = `宮崎駿`
			err = res.Update(controlItem)

			if err != nil {
				t.Fatalf(`Could not update with wrapper %s: %q`, wrapper, err)
			}

			res.One(&testItem)

			if reflect.DeepEqual(testItem, controlItem) == false {
				t.Fatalf("Struct is different with wrapper %s.", wrapper)
			}

			err = res.Remove()

			if err != nil {
				t.Fatalf(`Could not remove with wrapper %s: %q`, wrapper, err)
			}

			total, err = res.Count()

			if total != 0 {
				t.Fatalf(`Expecting no items %s: %q`, wrapper, err)
			}

			err = res.Close()
			if err != nil {
				t.Errorf("Failed to close result %s: %q.", wrapper, err)
			}

			err = sess.Close()
			if err != nil {
				t.Errorf("Failed to close %s: %q.", wrapper, err)
			}

		}
	}
}

func TestSimpleCRUD(t *testing.T) {
	var err error

	var controlItem Birthday

	for _, wrapper := range wrappers {
		if settings[wrapper] == nil {
			t.Fatalf(`No such settings entry for wrapper %s.`, wrapper)
		} else {
			var sess db.Database

			sess, err = db.Open(wrapper, *settings[wrapper])
			if err != nil {
				t.Fatalf(`Test for wrapper %s failed: %s`, wrapper, err.Error())
			}

			controlItem = Birthday{
				Name: "Hayao Miyazaki",
				Born: time.Date(1941, time.January, 5, 0, 0, 0, 0, time.Local),
			}

			col, err := sess.Collection(`birthdays`)

			if err != nil {
				if wrapper == `mongo` && err == db.ErrCollectionDoesNotExists {
					// Expected error with mongodb.
				} else {
					t.Fatalf(`Could not use collection with wrapper %s: %s`, wrapper, err.Error())
				}
			}

			var id interface{}

			id, err = col.Append(controlItem)

			if err != nil {
				t.Fatalf(`Could not append item with wrapper %s: %s`, wrapper, err.Error())
			}

			var res db.Result
			if wrapper == `mongo` {
				res = col.Find(db.Cond{"_id": id})
			} else {
				res = col.Find(db.Cond{"id": id})
			}

			var testItem Birthday

			res.One(&testItem)

			if reflect.DeepEqual(testItem, controlItem) == false {
				t.Errorf("Struct is different with wrapper %s.", wrapper)
			}

			controlItem.Name = `宮崎駿`
			err = res.Update(controlItem)

			if err != nil {
				t.Fatalf(`Could not update with wrapper %s: %s`, wrapper, err.Error())
			}

			res.One(&testItem)

			if reflect.DeepEqual(testItem, controlItem) == false {
				t.Errorf("Struct is different with wrapper %s.", wrapper)
			}

			err = res.Remove()

			if err != nil {
				t.Fatalf(`Could not update with wrapper %s: %s`, wrapper, err.Error())
			}

			var total uint64
			total, err = res.Count()

			if total != 0 {
				t.Fatalf(`Expecting no items %s: %s`, wrapper, err.Error())
			}

			err = res.Close()
			if err != nil {
				t.Errorf("Failed to close result %s: %s.", wrapper, err.Error())
			}

			err = sess.Close()
			if err != nil {
				t.Errorf("Failed to close %s: %s.", wrapper, err.Error())
			}

		}
	}
}