Bean: Support autowire by tag

Orm: Support default value filter

go.mod

@@ -35,6 +35,7 @@ require (
 	golang.org/x/tools v0.0.0-20200117065230-39095c1d176c
 	google.golang.org/grpc v1.31.0 // indirect
 	gopkg.in/yaml.v2 v2.2.8
+	github.com/pkg/errors v0.9.1
 )
 
 replace golang.org/x/crypto v0.0.0-20181127143415-eb0de9b17e85 => github.com/golang/crypto v0.0.0-20181127143415-eb0de9b17e85

go.sum

@@ -135,6 +135,8 @@ github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
@@ -185,6 +187,7 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -219,6 +222,8 @@ golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20200117065230-39095c1d176c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=

pkg/bean/context.go

@@ -0,0 +1,21 @@
+// Copyright 2020 
+//
+// 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 bean
+
+// ApplicationContext define for future
+// when we decide to support DI, IoC, this will be core API
+type ApplicationContext interface {
+
+}

pkg/bean/doc.go

@@ -0,0 +1,17 @@
+// Copyright 2020 
+//
+// 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.
+
+// bean is a basic package
+// it should not depend on other modules except common module, log module and config module
+package bean

pkg/bean/factory.go

@@ -0,0 +1,25 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+)
+
+// AutoWireBeanFactory wire the bean based on ApplicationContext and context.Context
+type AutoWireBeanFactory interface {
+	// AutoWire will wire the bean.
+	AutoWire(ctx context.Context, appCtx ApplicationContext, bean interface{}) error
+}

pkg/bean/metadata.go

@@ -0,0 +1,28 @@
+// Copyright 2020 
+//
+// 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 bean
+
+// BeanMetadata, in other words, bean's config.
+// it could be read from config file
+type BeanMetadata struct {
+	// Fields: field name => field metadata
+	Fields map[string]*FieldMetadata
+}
+
+// FieldMetadata contains metadata
+type FieldMetadata struct {
+	// default value in string format
+	DftValue string
+}

pkg/bean/tag_auto_wire_bean_factory.go

@@ -0,0 +1,231 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"strconv"
+
+	"github.com/pkg/errors"
+
+	"github.com/astaxie/beego/pkg/logs"
+)
+
+const DefaultValueTagKey = "default"
+
+// TagAutoWireBeanFactory wire the bean based on Fields' tag
+// if field's value is "zero value", we will execute injection
+// see reflect.Value.IsZero()
+// If field's kind is one of(reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Slice
+// reflect.UnsafePointer, reflect.Array, reflect.Uintptr, reflect.Complex64, reflect.Complex128
+// reflect.Ptr, reflect.Struct),
+// it will be ignored
+type TagAutoWireBeanFactory struct {
+	// we allow user register their TypeAdapter
+	Adapters map[string]TypeAdapter
+
+	// FieldTagParser is an extension point which means that you can custom how to read field's metadata from tag
+	FieldTagParser func(field reflect.StructField) *FieldMetadata
+}
+
+// NewTagAutoWireBeanFactory create an instance of TagAutoWireBeanFactory
+// by default, we register Time adapter, the time will be parse by using layout "2006-01-02 15:04:05"
+// If you need more adapter, you can implement interface TypeAdapter
+func NewTagAutoWireBeanFactory() *TagAutoWireBeanFactory {
+	return &TagAutoWireBeanFactory{
+		Adapters: map[string]TypeAdapter{
+			"Time": &TimeTypeAdapter{Layout: "2006-01-02 15:04:05"},
+		},
+
+		FieldTagParser: func(field reflect.StructField) *FieldMetadata {
+			return &FieldMetadata{
+				DftValue: field.Tag.Get(DefaultValueTagKey),
+			}
+		},
+	}
+}
+
+// AutoWire use value from appCtx to wire the bean, or use default value, or do nothing
+func (t *TagAutoWireBeanFactory) AutoWire(ctx context.Context, appCtx ApplicationContext, bean interface{}) error {
+	if bean == nil {
+		return nil
+	}
+
+	v := reflect.Indirect(reflect.ValueOf(bean))
+
+	bm := t.getConfig(v)
+
+	// field name, field metadata
+	for fn, fm := range bm.Fields {
+
+		fValue := v.FieldByName(fn)
+		if len(fm.DftValue) == 0 || !t.needInject(fValue) || !fValue.CanSet() {
+			continue
+		}
+
+		// handle type adapter
+		typeName := fValue.Type().Name()
+		if adapter, ok := t.Adapters[typeName]; ok {
+			dftValue, err := adapter.DefaultValue(ctx, fm.DftValue)
+			if err == nil {
+				fValue.Set(reflect.ValueOf(dftValue))
+				continue
+			} else {
+				return err
+			}
+		}
+
+		switch fValue.Kind() {
+		case reflect.Bool:
+			if v, err := strconv.ParseBool(fm.DftValue); err != nil {
+				return errors.WithMessage(err,
+					fmt.Sprintf("can not convert the field[%s]'s default value[%s] to bool value",
+						fn, fm.DftValue))
+			} else {
+				fValue.SetBool(v)
+				continue
+			}
+		case reflect.Int:
+			if err := t.setIntXValue(fm.DftValue, 0, fn, fValue); err != nil {
+				return err
+			}
+			continue
+		case reflect.Int8:
+			if err := t.setIntXValue(fm.DftValue, 8, fn, fValue); err != nil {
+				return err
+			}
+			continue
+		case reflect.Int16:
+			if err := t.setIntXValue(fm.DftValue, 16, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Int32:
+			if err := t.setIntXValue(fm.DftValue, 32, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Int64:
+			if err := t.setIntXValue(fm.DftValue, 64, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Uint:
+			if err := t.setUIntXValue(fm.DftValue, 0, fn, fValue); err != nil {
+				return err
+			}
+
+		case reflect.Uint8:
+			if err := t.setUIntXValue(fm.DftValue, 8, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Uint16:
+			if err := t.setUIntXValue(fm.DftValue, 16, fn, fValue); err != nil {
+				return err
+			}
+			continue
+		case reflect.Uint32:
+			if err := t.setUIntXValue(fm.DftValue, 32, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Uint64:
+			if err := t.setUIntXValue(fm.DftValue, 64, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.Float32:
+			if err := t.setFloatXValue(fm.DftValue, 32, fn, fValue); err != nil {
+				return err
+			}
+			continue
+		case reflect.Float64:
+			if err := t.setFloatXValue(fm.DftValue, 64, fn, fValue); err != nil {
+				return err
+			}
+			continue
+
+		case reflect.String:
+			fValue.SetString(fm.DftValue)
+			continue
+
+		// case reflect.Ptr:
+		// case reflect.Struct:
+		default:
+			logs.Warn("this field[%s] has default setting, but we don't support this type: %s",
+				fn, fValue.Kind().String())
+		}
+	}
+	return nil
+}
+
+func (t *TagAutoWireBeanFactory) setFloatXValue(dftValue string, bitSize int, fn string, fv reflect.Value) error {
+	if v, err := strconv.ParseFloat(dftValue, bitSize); err != nil {
+		return errors.WithMessage(err,
+			fmt.Sprintf("can not convert the field[%s]'s default value[%s] to float%d value",
+				fn, dftValue, bitSize))
+	} else {
+		fv.SetFloat(v)
+		return nil
+	}
+}
+
+func (t *TagAutoWireBeanFactory) setUIntXValue(dftValue string, bitSize int, fn string, fv reflect.Value) error {
+	if v, err := strconv.ParseUint(dftValue, 10, bitSize); err != nil {
+		return errors.WithMessage(err,
+			fmt.Sprintf("can not convert the field[%s]'s default value[%s] to uint%d value",
+				fn, dftValue, bitSize))
+	} else {
+		fv.SetUint(v)
+		return nil
+	}
+}
+
+func (t *TagAutoWireBeanFactory) setIntXValue(dftValue string, bitSize int, fn string, fv reflect.Value) error {
+	if v, err := strconv.ParseInt(dftValue, 10, bitSize); err != nil {
+		return errors.WithMessage(err,
+			fmt.Sprintf("can not convert the field[%s]'s default value[%s] to int%d value",
+				fn, dftValue, bitSize))
+	} else {
+		fv.SetInt(v)
+		return nil
+	}
+}
+
+func (t *TagAutoWireBeanFactory) needInject(fValue reflect.Value) bool {
+	return fValue.IsZero()
+}
+
+// getConfig never return nil
+func (t *TagAutoWireBeanFactory) getConfig(beanValue reflect.Value) *BeanMetadata {
+	fms := make(map[string]*FieldMetadata, beanValue.NumField())
+	for i := 0; i < beanValue.NumField(); i++ {
+		// f => StructField
+		f := beanValue.Type().Field(i)
+		fms[f.Name] = t.FieldTagParser(f)
+	}
+	return &BeanMetadata{
+		Fields: fms,
+	}
+}

pkg/bean/tag_auto_wire_bean_factory_test.go

@@ -0,0 +1,75 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTagAutoWireBeanFactory_AutoWire(t *testing.T) {
+	factory := NewTagAutoWireBeanFactory()
+	bm := &ComplicateStruct{}
+	err := factory.AutoWire(context.Background(), nil, bm)
+	assert.Nil(t, err)
+	assert.Equal(t, 12, bm.IntValue)
+	assert.Equal(t, "hello, strValue", bm.StrValue)
+
+	assert.Equal(t, int8(8), bm.Int8Value)
+	assert.Equal(t, int16(16), bm.Int16Value)
+	assert.Equal(t, int32(32), bm.Int32Value)
+	assert.Equal(t, int64(64), bm.Int64Value)
+
+	assert.Equal(t, uint(13), bm.UintValue)
+	assert.Equal(t, uint8(88), bm.Uint8Value)
+	assert.Equal(t, uint16(1616), bm.Uint16Value)
+	assert.Equal(t, uint32(3232), bm.Uint32Value)
+	assert.Equal(t, uint64(6464), bm.Uint64Value)
+
+	assert.Equal(t, float32(32.32), bm.Float32Value)
+	assert.Equal(t, float64(64.64), bm.Float64Value)
+
+	assert.True(t, bm.BoolValue)
+	assert.Equal(t, 0, bm.ignoreInt)
+
+	assert.NotNil(t, bm.TimeValue)
+}
+
+type ComplicateStruct struct {
+	IntValue   int    `default:"12"`
+	StrValue   string `default:"hello, strValue"`
+	Int8Value  int8   `default:"8"`
+	Int16Value int16  `default:"16"`
+	Int32Value int32  `default:"32"`
+	Int64Value int64  `default:"64"`
+
+	UintValue   uint   `default:"13"`
+	Uint8Value  uint8  `default:"88"`
+	Uint16Value uint16 `default:"1616"`
+	Uint32Value uint32 `default:"3232"`
+	Uint64Value uint64 `default:"6464"`
+
+	Float32Value float32 `default:"32.32"`
+	Float64Value float64 `default:"64.64"`
+
+	BoolValue bool `default:"true"`
+
+	ignoreInt int `default:"11"`
+
+	TimeValue time.Time `default:"2018-02-03 12:13:14.000"`
+}

pkg/bean/time_type_adapter.go

@@ -0,0 +1,36 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+	"time"
+
+)
+
+// TimeTypeAdapter process the time.Time
+type TimeTypeAdapter struct {
+	Layout string
+}
+
+// DefaultValue parse the DftValue to time.Time
+// and if the DftValue == now
+// time.Now() is returned
+func (t *TimeTypeAdapter) DefaultValue(ctx context.Context, dftValue string) (interface{}, error) {
+	if dftValue == "now"{
+		return time.Now(), nil
+	}
+	return time.Parse(t.Layout, dftValue)
+}

pkg/bean/time_type_adapter_test.go

@@ -0,0 +1,29 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTimeTypeAdapter_DefaultValue(t *testing.T) {
+	typeAdapter := &TimeTypeAdapter{Layout: "2006-01-02 15:04:05"}
+	tm, err := typeAdapter.DefaultValue(context.Background(), "2018-02-03 12:34:11")
+	assert.Nil(t, err)
+	assert.NotNil(t, tm)
+}

pkg/bean/type_adapter.go

@@ -0,0 +1,26 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+)
+
+// TypeAdapter is an abstraction that define some behavior of target type
+// usually, we don't use this to support basic type since golang has many restriction for basic types
+// This is an important extension point
+type TypeAdapter interface {
+	DefaultValue(ctx context.Context, dftValue string) (interface{}, error)
+}

pkg/orm/filter/bean/default_value_filter.go

@@ -0,0 +1,136 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"context"
+	"reflect"
+	"strings"
+
+	"github.com/astaxie/beego/pkg/bean"
+	"github.com/astaxie/beego/pkg/logs"
+	"github.com/astaxie/beego/pkg/orm"
+)
+
+// DefaultValueFilterChainBuilder only works for InsertXXX method,
+// But InsertOrUpdate and InsertOrUpdateWithCtx is more dangerous than other methods.
+// so we won't handle those two methods unless you set includeInsertOrUpdate to true
+// And if the element is not pointer, this filter doesn't work
+type DefaultValueFilterChainBuilder struct {
+	factory                bean.AutoWireBeanFactory
+	compatibleWithOldStyle bool
+
+	// only the includeInsertOrUpdate is true, this filter will handle those two methods
+	includeInsertOrUpdate bool
+}
+
+// NewDefaultValueFilterChainBuilder will create an instance of DefaultValueFilterChainBuilder
+// In beego v1.x, the default value config looks like orm:default(xxxx)
+// But the default value in 2.x is default:xxx
+// so if you want to be compatible with v1.x, please pass true as compatibleWithOldStyle
+func NewDefaultValueFilterChainBuilder(typeAdapters map[string]bean.TypeAdapter,
+	includeInsertOrUpdate bool,
+	compatibleWithOldStyle bool) *DefaultValueFilterChainBuilder {
+	factory := bean.NewTagAutoWireBeanFactory()
+
+	if compatibleWithOldStyle {
+		newParser := factory.FieldTagParser
+		factory.FieldTagParser = func(field reflect.StructField) *bean.FieldMetadata {
+			if newParser != nil && field.Tag.Get(bean.DefaultValueTagKey) != "" {
+				return newParser(field)
+			} else {
+				res := &bean.FieldMetadata{}
+				ormMeta := field.Tag.Get("orm")
+				ormMetaParts := strings.Split(ormMeta, ";")
+				for _, p := range ormMetaParts {
+					if strings.HasPrefix(p, "default(") && strings.HasSuffix(p, ")") {
+						res.DftValue = p[8 : len(p)-1]
+					}
+				}
+				return res
+			}
+		}
+	}
+
+	for k, v := range typeAdapters {
+		factory.Adapters[k] = v
+	}
+
+	return &DefaultValueFilterChainBuilder{
+		factory:                factory,
+		compatibleWithOldStyle: compatibleWithOldStyle,
+		includeInsertOrUpdate:  includeInsertOrUpdate,
+	}
+}
+
+func (d *DefaultValueFilterChainBuilder) FilterChain(next orm.Filter) orm.Filter {
+	return func(ctx context.Context, inv *orm.Invocation) {
+		switch inv.Method {
+		case "Insert", "InsertWithCtx":
+			d.handleInsert(ctx, inv)
+			break
+		case "InsertOrUpdate", "InsertOrUpdateWithCtx":
+			d.handleInsertOrUpdate(ctx, inv)
+			break
+		case "InsertMulti", "InsertMultiWithCtx":
+			d.handleInsertMulti(ctx, inv)
+			break
+		}
+		next(ctx, inv)
+	}
+}
+
+func (d *DefaultValueFilterChainBuilder) handleInsert(ctx context.Context, inv *orm.Invocation) {
+	d.setDefaultValue(ctx, inv.Args[0])
+}
+
+func (d *DefaultValueFilterChainBuilder) handleInsertOrUpdate(ctx context.Context, inv *orm.Invocation) {
+	if d.includeInsertOrUpdate {
+		ins := inv.Args[0]
+		if ins == nil {
+			return
+		}
+
+		pkName := inv.GetPkFieldName()
+		pkField := reflect.Indirect(reflect.ValueOf(ins)).FieldByName(pkName)
+
+		if pkField.IsZero() {
+			d.setDefaultValue(ctx, ins)
+		}
+	}
+}
+
+func (d *DefaultValueFilterChainBuilder) handleInsertMulti(ctx context.Context, inv *orm.Invocation) {
+	mds := inv.Args[1]
+
+	if t := reflect.TypeOf(mds).Kind(); t != reflect.Array && t != reflect.Slice {
+		// do nothing
+		return
+	}
+
+	mdsArr := reflect.Indirect(reflect.ValueOf(mds))
+	for i := 0; i < mdsArr.Len(); i++ {
+		d.setDefaultValue(ctx, mdsArr.Index(i).Interface())
+	}
+	logs.Warn("%v", mdsArr.Index(0).Interface())
+}
+
+func (d *DefaultValueFilterChainBuilder) setDefaultValue(ctx context.Context, ins interface{}) {
+	err := d.factory.AutoWire(ctx, nil, ins)
+	if err != nil {
+		logs.Error("try to wire the bean for orm.Insert failed. "+
+			"the default value is not set: %v, ", err)
+	}
+}

pkg/orm/filter/bean/default_value_filter_test.go

@@ -0,0 +1,73 @@
+// Copyright 2020 
+//
+// 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 bean
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/astaxie/beego/pkg/orm"
+)
+
+func TestDefaultValueFilterChainBuilder_FilterChain(t *testing.T) {
+	builder := NewDefaultValueFilterChainBuilder(nil, true, true)
+	o := orm.NewFilterOrmDecorator(&defaultValueTestOrm{}, builder.FilterChain)
+
+	// test insert
+	entity := &DefaultValueTestEntity{}
+	_, _ = o.Insert(entity)
+	assert.Equal(t, 12, entity.Age)
+	assert.Equal(t, 13, entity.AgeInOldStyle)
+	assert.Equal(t, 0, entity.AgeIgnore)
+
+	// test InsertOrUpdate
+	entity = &DefaultValueTestEntity{}
+	orm.RegisterModel(entity)
+
+
+	_, _ = o.InsertOrUpdate(entity)
+	assert.Equal(t, 12, entity.Age)
+	assert.Equal(t, 13, entity.AgeInOldStyle)
+
+	// we won't set the default value because we find the pk is not Zero value
+	entity.Id = 3
+	entity.AgeInOldStyle = 0
+	_, _ = o.InsertOrUpdate(entity)
+	assert.Equal(t, 0, entity.AgeInOldStyle)
+
+	entity = &DefaultValueTestEntity{}
+
+	// the entity is not array, it will be ignored
+	_, _ = o.InsertMulti(3, entity)
+	assert.Equal(t, 0, entity.Age)
+	assert.Equal(t, 0, entity.AgeInOldStyle)
+
+	_, _ = o.InsertMulti(3, []*DefaultValueTestEntity{entity})
+	assert.Equal(t, 12, entity.Age)
+	assert.Equal(t, 13, entity.AgeInOldStyle)
+
+}
+
+type defaultValueTestOrm struct {
+	orm.DoNothingOrm
+}
+
+type DefaultValueTestEntity struct {
+	Id int`orm:pk`
+	Age           int `default:"12"`
+	AgeInOldStyle int `orm:"default(13);bee()"`
+	AgeIgnore     int
+}

pkg/orm/invocation.go

@@ -46,3 +46,12 @@ func (inv *Invocation) GetTableName() string {
 func (inv *Invocation) execute() {
 	inv.f()
 }
+
+// GetPkFieldName return the primary key of this table
+// if not found, "" is returned
+func (inv *Invocation) GetPkFieldName() string {
+	if inv.mi.fields.pk != nil {
+		return inv.mi.fields.pk.name
+	}
+	return ""
+}