diff --git a/variable/interfaces/interface.go b/variable/interfaces/interface.go
index d164d8c..a5b6245 100644
--- a/variable/interfaces/interface.go
+++ b/variable/interfaces/interface.go
@@ -15,4 +15,5 @@ type Constraint interface {
 	String() string
 	Validate() error
 	DescriptionStr() *string
+	ToMap() map[string]any
 }
diff --git a/variable/types/base_constraint.go b/variable/types/base_constraint.go
index db9a43b..c3ef7d4 100644
--- a/variable/types/base_constraint.go
+++ b/variable/types/base_constraint.go
@@ -8,3 +8,10 @@ type BaseConstraint struct {
 func (b *BaseConstraint) DescriptionStr() *string {
 	return &b.Description
 }
+
+func (b *BaseConstraint) ToMap() map[string]any {
+	m := make(map[string]any)
+	m["default"] = b.Default
+	m["description"] = b.Description
+	return m
+}
diff --git a/variable/types/float_constraint.go b/variable/types/float_constraint.go
index 05e46d0..8fb518b 100644
--- a/variable/types/float_constraint.go
+++ b/variable/types/float_constraint.go
@@ -37,4 +37,15 @@ func (i *FloatConstraint) Validate() error {
 	return nil
 }
 
+func (i *FloatConstraint) ToMap() map[string]any {
+	m := i.BaseConstraint.ToMap()
+	if i.Min != nil {
+		m["min"] = *i.Min
+	}
+	if i.Max != nil {
+		m["max"] = *i.Max
+	}
+	return m
+}
+
 var _ interfaces.Constraint = &FloatConstraint{}
diff --git a/variable/types/int_constraint.go b/variable/types/int_constraint.go
index e651b70..3517b99 100644
--- a/variable/types/int_constraint.go
+++ b/variable/types/int_constraint.go
@@ -37,4 +37,15 @@ func (i *IntConstraint) Validate() error {
 	return nil
 }
 
+func (i *IntConstraint) ToMap() map[string]any {
+	m := i.BaseConstraint.ToMap()
+	if i.Min != nil {
+		m["min"] = *i.Min
+	}
+	if i.Max != nil {
+		m["max"] = *i.Max
+	}
+	return m
+}
+
 var _ interfaces.Constraint = &IntConstraint{}
diff --git a/variable/types/nil_constraint.go b/variable/types/nil_constraint.go
index 60de486..86922a2 100644
--- a/variable/types/nil_constraint.go
+++ b/variable/types/nil_constraint.go
@@ -21,4 +21,9 @@ func (c *NilConstraint) DescriptionStr() *string {
 	return nil
 }
 
+func (c *NilConstraint) ToMap() map[string]any {
+	m := make(map[string]any)
+	return m
+}
+
 var _ interfaces.Constraint = &NilConstraint{}
diff --git a/variable/types/string_constraint.go b/variable/types/string_constraint.go
index e5d10c9..bae8b87 100644
--- a/variable/types/string_constraint.go
+++ b/variable/types/string_constraint.go
@@ -33,4 +33,15 @@ func (s *StringConstraint) Validate() error {
 	return nil
 }
 
+func (s *StringConstraint) ToMap() map[string]any {
+	m := s.BaseConstraint.ToMap()
+	if s.MinLength != nil {
+		m["minLen"] = *s.MinLength
+	}
+	if s.MaxLength != nil {
+		m["maxLen"] = *s.MaxLength
+	}
+	return m
+}
+
 var _ interfaces.Constraint = &StringConstraint{}