Filter field names

app/main.go

@@ -8,6 +8,7 @@ import (
 	"repo-pattern/app/models"
 	"repo-pattern/app/repository"
 	"repo-pattern/app/repository/smartfilter"
+	"time"
 
 	"gorm.io/gorm"
 )
@@ -17,6 +18,17 @@ var (
 	FALSE = false
 )
 
+type CertFilter struct {
+	Alive                *bool      `filterfield:"field=alive,operator=EQ"`
+	SerialNumber         *string    `filterfield:"field=serial_number,operator=NE"`
+	SerialNumberContains *string    `filterfield:"field=serial_number,operator=LIKE"`
+	IssuerContains       *string    `filterfield:"field=issuer,operator=ILIKE"`
+	Id                   *string    `filterfield:"field=id,operator=EQ"`
+	Ids                  *[]string  `filterfield:"field=id,operator=IN"`
+	IdsNot               *[]string  `filterfield:"field=id,operator=NOT_IN"`
+	CreatedAt_Lt         *time.Time `filterfield:"field=created_at,operator=LT"`
+}
+
 func doMagic(db *gorm.DB) {
 	var err error
 	query := db
@@ -29,7 +41,7 @@ func doMagic(db *gorm.DB) {
 	// createdTime := time.Date(2024, 5, 26, 16, 8, 0, 0, location)
 	ids := []string{"eb2bcac6-5173-4dbb-93b7-e7c03b924a03", "db9fb837-3483-4736-819d-f427dc8cda23", "1fece5e7-8e8d-4828-8298-3b1f07fd29ff"}
 
-	filter := smartfilter.CertFilter{
+	filter := CertFilter{
 		// Alive: &FALSE,
 		// Id:    &id,
 		// SerialNumber: &serialNumber,
@@ -56,7 +68,7 @@ func doList(db *gorm.DB) {
 	repo := repository.RepoBase[models.Cert]{}
 	repo.Init(db)
 
-	filter := smartfilter.CertFilter{
+	filter := CertFilter{
 		Alive: &TRUE,
 	}
 
@@ -76,7 +88,7 @@ func doGet(db *gorm.DB) {
 
 	id := "db9fb837-3483-4736-819d-f427dc8cda23"
 
-	filter := smartfilter.CertFilter{
+	filter := CertFilter{
 		Id: &id,
 	}
 
@@ -93,7 +105,7 @@ func doExists(db *gorm.DB) {
 
 	id := "db9fb837-3483-4736-819d-f427dc8cda23"
 
-	filter := smartfilter.CertFilter{
+	filter := CertFilter{
 		Id: &id,
 	}
 

app/repository/smartfilter/filterfield.go

@@ -234,7 +234,6 @@ type sliceGetter struct {
 func (sg sliceGetter) getValue(ff *FilterField, v reflect.Value) error {
 	for n := range v.Len() {
 		element := v.Index(n)
-		fmt.Printf("ELEMENT: %+v\n", element)
 
 		switch element.Kind() {
 		case reflect.Bool:

app/repository/smartfilter/handlers_test.go

@@ -38,7 +38,7 @@ func (m MyModel) TableName() string {
 	return "my_models"
 }
 
-type TestCase struct {
+type HandleOperatorTestCase struct {
 	name        string
 	filterField FilterField
 	expected    string
@@ -63,7 +63,7 @@ func TestHandleOperatorEQ(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorEQ
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorEQ bool true",
 			filterField: FilterField{
@@ -136,7 +136,7 @@ func TestHandleOperatorNE(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorNE
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorNE bool true",
 			filterField: FilterField{
@@ -209,7 +209,7 @@ func TestHandleOperatorLIKE(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorLIKE
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorLIKE",
 			filterField: FilterField{
@@ -237,7 +237,7 @@ func TestHandleOperatorILIKE(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorILIKE
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorILIKE",
 			filterField: FilterField{
@@ -265,7 +265,7 @@ func TestHandleOperatorGT(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorGT
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorGT int64",
 			filterField: FilterField{
@@ -320,7 +320,7 @@ func TestHandleOperatorGE(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorGE
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorGE int64",
 			filterField: FilterField{
@@ -375,7 +375,7 @@ func TestHandleOperatorLT(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorLT
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorLT int64",
 			filterField: FilterField{
@@ -430,7 +430,7 @@ func TestHandleOperatorLE(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorLE
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorLE int64",
 			filterField: FilterField{
@@ -485,7 +485,7 @@ func TestHandleOperatorIN(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorIN
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorIN bool",
 			filterField: FilterField{
@@ -549,7 +549,7 @@ func TestHandleOperatorNOT_IN(t *testing.T) {
 	db, _ := NewMockDB()
 	testFunc := handleOperatorNOT_IN
 
-	testCases := []TestCase{
+	testCases := []HandleOperatorTestCase{
 		{
 			name: "handleOperatorNOT_IN bool",
 			filterField: FilterField{

app/repository/smartfilter/smartfilter.go

@@ -5,14 +5,14 @@ import (
 	"reflect"
 	"slices"
 	"strings"
-	"time"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/schema"
 )
 
 const TAG_NAME = "filterfield"
-const TAG_VALUE_SEPARATOR = ","
+const TAG_PAIRS_SEPARATOR = ","
+const TAG_KEYVALUE_SEPARATOR = "="
 
 type handlerFunc func(query *gorm.DB, tableName string, filterField *FilterField) *gorm.DB
 
@@ -29,17 +29,6 @@ var operatorHandlers = map[Operator]handlerFunc{
 	OperatorNOT_IN: handleOperatorNOT_IN,
 }
 
-type CertFilter struct {
-	Alive                *bool      `filterfield:"alive,EQ"`
-	SerialNumber         *string    `filterfield:"serial_number,NE"`
-	SerialNumberContains *string    `filterfield:"serial_number,LIKE"`
-	IssuerContains       *string    `filterfield:"issuer,ILIKE"`
-	Id                   *string    `filterfield:"id,EQ"`
-	Ids                  *[]string  `filterfield:"id,IN"`
-	IdsNot               *[]string  `filterfield:"id,NOT_IN"`
-	CreatedAt_Lt         *time.Time `filterfield:"created_at,LT"`
-}
-
 type ReflectedStructField struct {
 	name     string
 	value    reflect.Value
@@ -112,19 +101,39 @@ func ToQuery(model schema.Tabler, filter interface{}, query *gorm.DB) (*gorm.DB,
 }
 
 func newFilterField(tagValue string) (*FilterField, error) {
-	values := strings.Split(tagValue, TAG_VALUE_SEPARATOR)
+	filterField := FilterField{}
-	if len(values) != 2 {
+
-		return nil, fmt.Errorf("incorrect number of tag values: %s", tagValue)
+	tagValue = strings.TrimSpace(tagValue)
+	pairs := strings.Split(tagValue, TAG_PAIRS_SEPARATOR)
+
+	for _, pair := range pairs {
+		kvs := strings.Split(pair, TAG_KEYVALUE_SEPARATOR)
+		if len(kvs) != 2 {
+			return nil, fmt.Errorf("invalid tag value: %s", strings.TrimSpace(pair))
+		}
+		key := strings.TrimSpace(kvs[0])
+		value := strings.TrimSpace(kvs[1])
+
+		switch key {
+		case "field":
+			filterField.Name = value
+		case "operator":
+			operator := Operator(value)
+			if !slices.Contains(OPERATORS, operator) {
+				return nil, fmt.Errorf("unknown operator: %s", operator)
+			}
+			filterField.Operator = operator
+		default:
+			return nil, fmt.Errorf("invalid value key: %s", key)
+		}
 	}
 
-	operator := Operator(values[1])
+	if len(filterField.Name) == 0 {
-	if !slices.Contains(OPERATORS, operator) {
+		return nil, fmt.Errorf("missing field name in tag: %s", tagValue)
-		return nil, fmt.Errorf("unknown operator: %s", operator)
+	}
+	if len(filterField.Operator) == 0 {
+		return nil, fmt.Errorf("missing operator in tag: %s", tagValue)
 	}
 
-	f := FilterField{
+	return &filterField, nil
-		Name:     values[0],
-		Operator: operator,
-	}
-	return &f, nil
 }

app/repository/smartfilter/smartfilter_test.go

@@ -129,3 +129,77 @@ func TestGetFilterFields(t *testing.T) {
 		assert.Equal(t, 0, len(result))
 	})
 }
+
+type TagParseTestCase struct {
+	name     string
+	tagValue string
+	expected FilterField
+}
+
+func TestFilterField(t *testing.T) {
+	testCases := []TagParseTestCase{
+		{
+			name:     "Parse without spaces",
+			tagValue: "field=field_1,operator=EQ",
+			expected: FilterField{
+				Name:     "field_1",
+				Operator: OperatorEQ,
+			},
+		},
+		{
+			name:     "Parse spaces between pairs",
+			tagValue: "   field=field_2 ,   operator=LT   ",
+			expected: FilterField{
+				Name:     "field_2",
+				Operator: OperatorLT,
+			},
+		},
+		{
+			name:     "Parse spaces between around keys and values",
+			tagValue: "operator   = LIKE , field = field_3",
+			expected: FilterField{
+				Name:     "field_3",
+				Operator: OperatorLIKE,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			filterField, err := newFilterField(testCase.tagValue)
+			assert.Nil(t, err)
+			assert.Equal(t, testCase.expected.Name, filterField.Name)
+			assert.Equal(t, testCase.expected.Operator, filterField.Operator)
+		})
+	}
+
+	t.Run("Fail on invalid tag value", func(t *testing.T) {
+		filterField, err := newFilterField("field=field_1=fail, operator=EQ")
+		assert.Nil(t, filterField)
+		assert.EqualError(t, err, "invalid tag value: field=field_1=fail")
+	})
+
+	t.Run("Fail on invalid operator", func(t *testing.T) {
+		filterField, err := newFilterField("field=field_1, operator=FAIL")
+		assert.Nil(t, filterField)
+		assert.EqualError(t, err, "unknown operator: FAIL")
+	})
+
+	t.Run("Fail on invalid value key", func(t *testing.T) {
+		filterField, err := newFilterField("failkey=field_1, operator=FAIL")
+		assert.Nil(t, filterField)
+		assert.EqualError(t, err, "invalid value key: failkey")
+	})
+
+	t.Run("Fail on missing field name", func(t *testing.T) {
+		filterField, err := newFilterField("operator=EQ")
+		assert.Nil(t, filterField)
+		assert.EqualError(t, err, "missing field name in tag: operator=EQ")
+	})
+
+	t.Run("Fail on missing operator", func(t *testing.T) {
+		filterField, err := newFilterField("field=field_1")
+		assert.Nil(t, filterField)
+		assert.EqualError(t, err, "missing operator in tag: field=field_1")
+	})
+}