issue-#1

add lt validation function + test code
add lte validation function + test code
add gt validation function + test code
add get validation function + test code

baked_in.go

@@ -13,6 +13,10 @@ var BakedInValidators = map[string]ValidationFunc{
 	"len":         length,
 	"min":         min,
 	"max":         max,
+	"lt":          lt,
+	"lte":         lte,
+	"gt":          gt,
+	"gte":         gte,
 	"alpha":       alpha,
 	"alphanum":    alphanum,
 	"numeric":     numeric,
@@ -183,6 +187,78 @@ func required(field interface{}, param string) bool {
 	}
 }
 
+func gte(field interface{}, param string) bool {
+
+	st := reflect.ValueOf(field)
+
+	switch st.Kind() {
+
+	case reflect.String:
+		p := asInt(param)
+
+		return int64(len(st.String())) >= p
+
+	case reflect.Slice, reflect.Map, reflect.Array:
+		p := asInt(param)
+
+		return int64(st.Len()) >= p
+
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		p := asInt(param)
+
+		return st.Int() >= p
+
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		p := asUint(param)
+
+		return st.Uint() >= p
+
+	case reflect.Float32, reflect.Float64:
+		p := asFloat(param)
+
+		return st.Float() >= p
+
+	default:
+		panic(fmt.Sprintf("Bad field type for Input Param %s for %s\n", param, field))
+	}
+}
+
+func gt(field interface{}, param string) bool {
+
+	st := reflect.ValueOf(field)
+
+	switch st.Kind() {
+
+	case reflect.String:
+		p := asInt(param)
+
+		return int64(len(st.String())) > p
+
+	case reflect.Slice, reflect.Map, reflect.Array:
+		p := asInt(param)
+
+		return int64(st.Len()) > p
+
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		p := asInt(param)
+
+		return st.Int() > p
+
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		p := asUint(param)
+
+		return st.Uint() > p
+
+	case reflect.Float32, reflect.Float64:
+		p := asFloat(param)
+
+		return st.Float() > p
+
+	default:
+		panic(fmt.Sprintf("Bad field type for Input Param %s for %s\n", param, field))
+	}
+}
+
 // length tests whether a variable's length is equal to a given
 // value. For strings it tests the number of characters whereas
 // for maps and slices it tests the number of items.
@@ -228,6 +304,11 @@ func length(field interface{}, param string) bool {
 // and slices it tests the number of items.
 func min(field interface{}, param string) bool {
 
+	return gte(field, param)
+}
+
+func lte(field interface{}, param string) bool {
+
 	st := reflect.ValueOf(field)
 
 	switch st.Kind() {
@@ -235,38 +316,34 @@ func min(field interface{}, param string) bool {
 	case reflect.String:
 		p := asInt(param)
 
-		return int64(len(st.String())) >= p
+		return int64(len(st.String())) <= p
 
 	case reflect.Slice, reflect.Map, reflect.Array:
 		p := asInt(param)
 
-		return int64(st.Len()) >= p
+		return int64(st.Len()) <= p
 
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		p := asInt(param)
 
-		return st.Int() >= p
+		return st.Int() <= p
 
 	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		p := asUint(param)
 
-		return st.Uint() >= p
+		return st.Uint() <= p
 
 	case reflect.Float32, reflect.Float64:
 		p := asFloat(param)
 
-		return st.Float() >= p
+		return st.Float() <= p
 
 	default:
 		panic(fmt.Sprintf("Bad field type for Input Param %s for %s\n", param, field))
 	}
 }
 
-// max tests whether a variable value is lesser than a given
+func lt(field interface{}, param string) bool {
-// value. For numbers, it's a simple lesser-than test; for
-// strings it tests the number of characters whereas for maps
-// and slices it tests the number of items.
-func max(field interface{}, param string) bool {
 
 	st := reflect.ValueOf(field)
 
@@ -275,33 +352,42 @@ func max(field interface{}, param string) bool {
 	case reflect.String:
 		p := asInt(param)
 
-		return int64(len(st.String())) <= p
+		return int64(len(st.String())) < p
 
 	case reflect.Slice, reflect.Map, reflect.Array:
 		p := asInt(param)
 
-		return int64(st.Len()) <= p
+		return int64(st.Len()) < p
 
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		p := asInt(param)
 
-		return st.Int() <= p
+		return st.Int() < p
 
 	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		p := asUint(param)
 
-		return st.Uint() <= p
+		return st.Uint() < p
 
 	case reflect.Float32, reflect.Float64:
 		p := asFloat(param)
 
-		return st.Float() <= p
+		return st.Float() < p
 
 	default:
 		panic(fmt.Sprintf("Bad field type for Input Param %s for %s\n", param, field))
 	}
 }
 
+// max tests whether a variable value is lesser than a given
+// value. For numbers, it's a simple lesser-than test; for
+// strings it tests the number of characters whereas for maps
+// and slices it tests the number of items.
+func max(field interface{}, param string) bool {
+
+	return lte(field, param)
+}
+
 // asInt retuns the parameter as a int64
 // or panics if it can't convert
 func asInt(param string) int64 {

doc.go

@@ -163,6 +163,27 @@ Here is a list of the current built in validators:
 		the string length is at least that number of characters. For slices,
 		arrays, and maps, validates the number of items. (Usage: min=10)
 
+	gt
+		For numbers, this will ensure that the value is greater than the
+		parameter given. For strings, it checks that the string length
+		is greater than that number of characters. For slices, arrays
+		and maps it validates the number of items. (Usage: gt=10)
+
+	gte
+		Same as 'min' above. Kept both to make terminology with 'len' easier
+		(Usage: gte=10)
+
+	lt
+		For numbers, this will ensure that the value is
+		less than the parameter given. For strings, it checks
+		that the string length is less than that number of characters.
+		For slices, arrays, and maps it validates the number of items.
+		(Usage: lt=10)
+
+	lte
+		Same as 'max' above. Kept both to make terminology with 'len' easier
+		(Usage: lte=10)
+
 	alpha
 		This validates that a strings value contains alpha characters only
 		(Usage: alpha)

validator_test.go

@@ -34,6 +34,10 @@ type TestString struct {
 	Min       string `validate:"min=1"`
 	Max       string `validate:"max=10"`
 	MinMax    string `validate:"min=1,max=10"`
+	Lt        string `validate:"lt=10"`
+	Lte       string `validate:"lte=10"`
+	Gt        string `validate:"gt=10"`
+	Gte       string `validate:"gte=10"`
 	OmitEmpty string `validate:"omitempty,min=1,max=10"`
 	Sub       *SubTest
 	SubIgnore *SubTest `validate:"-"`
@@ -49,6 +53,10 @@ type TestInt32 struct {
 	Min       int `validate:"min=1"`
 	Max       int `validate:"max=10"`
 	MinMax    int `validate:"min=1,max=10"`
+	Lt        int `validate:"lt=10"`
+	Lte       int `validate:"lte=10"`
+	Gt        int `validate:"gt=10"`
+	Gte       int `validate:"gte=10"`
 	OmitEmpty int `validate:"omitempty,min=1,max=10"`
 }
 
@@ -425,6 +433,10 @@ func (ms *MySuite) TestFlattening(c *C) {
 		Min:       "min=1",
 		Max:       "1234567890",
 		MinMax:    "12345",
+		Lt:        "012345678",
+		Lte:       "0123456789",
+		Gt:        "01234567890",
+		Gte:       "0123456789",
 		OmitEmpty: "",
 		Sub: &SubTest{
 			Test: "1",
@@ -472,6 +484,8 @@ func (ms *MySuite) TestFlattening(c *C) {
 
 	// Assert Fields
 	AssertMapFieldError(err2, "Len", "len", c)
+	AssertMapFieldError(err2, "Gt", "gt", c)
+	AssertMapFieldError(err2, "Gte", "gte", c)
 
 	// Assert Struct Field
 	AssertMapFieldError(err2, "Sub.Test", "required", c)
@@ -491,6 +505,10 @@ func (ms *MySuite) TestStructStringValidation(c *C) {
 		Min:       "min=1",
 		Max:       "1234567890",
 		MinMax:    "12345",
+		Lt:        "012345678",
+		Lte:       "0123456789",
+		Gt:        "01234567890",
+		Gte:       "0123456789",
 		OmitEmpty: "",
 		Sub: &SubTest{
 			Test: "1",
@@ -517,6 +535,10 @@ func (ms *MySuite) TestStructStringValidation(c *C) {
 		Min:       "",
 		Max:       "12345678901",
 		MinMax:    "",
+		Lt:        "0123456789",
+		Lte:       "01234567890",
+		Gt:        "1",
+		Gte:       "1",
 		OmitEmpty: "12345678901",
 		Sub: &SubTest{
 			Test: "",
@@ -536,7 +558,7 @@ func (ms *MySuite) TestStructStringValidation(c *C) {
 	// Assert Top Level
 	c.Assert(err, NotNil)
 	c.Assert(err.Struct, Equals, "TestString")
-	c.Assert(len(err.Errors), Equals, 6)
+	c.Assert(len(err.Errors), Equals, 10)
 	c.Assert(len(err.StructErrors), Equals, 3)
 
 	// Assert Fields
@@ -545,6 +567,8 @@ func (ms *MySuite) TestStructStringValidation(c *C) {
 	AssertFieldError(err, "Min", "min", c)
 	AssertFieldError(err, "Max", "max", c)
 	AssertFieldError(err, "MinMax", "min", c)
+	AssertFieldError(err, "Gt", "gt", c)
+	AssertFieldError(err, "Gte", "gte", c)
 	AssertFieldError(err, "OmitEmpty", "max", c)
 
 	// Assert Anonymous embedded struct
@@ -566,6 +590,10 @@ func (ms *MySuite) TestStructInt32Validation(c *C) {
 		Min:       1,
 		Max:       10,
 		MinMax:    5,
+		Lt:        9,
+		Lte:       10,
+		Gt:        11,
+		Gte:       10,
 		OmitEmpty: 0,
 	}
 
@@ -578,6 +606,10 @@ func (ms *MySuite) TestStructInt32Validation(c *C) {
 		Min:       -1,
 		Max:       11,
 		MinMax:    -1,
+		Lt:        10,
+		Lte:       11,
+		Gt:        10,
+		Gte:       9,
 		OmitEmpty: 11,
 	}
 
@@ -586,7 +618,7 @@ func (ms *MySuite) TestStructInt32Validation(c *C) {
 	// Assert Top Level
 	c.Assert(err, NotNil)
 	c.Assert(err.Struct, Equals, "TestInt32")
-	c.Assert(len(err.Errors), Equals, 6)
+	c.Assert(len(err.Errors), Equals, 10)
 	c.Assert(len(err.StructErrors), Equals, 0)
 
 	// Assert Fields
@@ -595,6 +627,10 @@ func (ms *MySuite) TestStructInt32Validation(c *C) {
 	AssertFieldError(err, "Min", "min", c)
 	AssertFieldError(err, "Max", "max", c)
 	AssertFieldError(err, "MinMax", "min", c)
+	AssertFieldError(err, "Lt", "lt", c)
+	AssertFieldError(err, "Lte", "lte", c)
+	AssertFieldError(err, "Gt", "gt", c)
+	AssertFieldError(err, "Gte", "gte", c)
 	AssertFieldError(err, "OmitEmpty", "max", c)
 }