fix(json): plan's variables parsing error

types/db.go

@@ -109,7 +109,7 @@ type PlanModel struct {
 	PlanStateValueID sql.NullInt64  `gorm:"index" json:"-"`
 
 	// The variables set in the root module when creating the plan.
-	Variables []PlanModelVariable `json:"variables,omitempty"`
+	Variables planVariableList `json:"variables,omitempty"`
 
 	// The change operations for resources and data sources within this
 	// plan.
@@ -204,7 +204,7 @@ type PlanStateResource struct {
 	// empty.
 	//
 	// This value can be either an integer (int) or a string.
-	Index string `json:"index,omitempty"`
+	Index rawJSON `json:"index,omitempty"`
 
 	// The name of the provider this resource belongs to. This allows
 	// the provider to be interpreted unambiguously in the unusual
@@ -270,7 +270,7 @@ type PlanResourceChange struct {
 	// empty.
 	//
 	// This value can be either an integer (int) or a string.
-	Index string `json:"index,omitempty"`
+	Index rawJSON `json:"index,omitempty"`
 
 	// The name of the provider this resource belongs to. This allows
 	// the provider to be interpreted unambiguously in the unusual

types/json.go

@@ -11,6 +11,7 @@ import (
  *********************************************/
 
 type planOutputList []PlanOutput
+type planVariableList []PlanModelVariable
 type planStateOutputList []PlanStateOutput
 type planStateResourceAttributeList []PlanStateResourceAttribute
 type rawJSON string
@@ -35,6 +36,25 @@ func (p *planOutputList) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
+func (p *planVariableList) UnmarshalJSON(b []byte) error {
+	var tmp map[string]interface{}
+	err := json.Unmarshal(b, &tmp)
+	if err != nil {
+		return err
+	}
+
+	var list planVariableList
+	for key, value := range tmp {
+		list = append(list, PlanModelVariable{
+			Key:   key,
+			Value: fmt.Sprintf("%v", value),
+		})
+	}
+
+	*p = list
+	return nil
+}
+
 func (p *planStateOutputList) UnmarshalJSON(b []byte) error {
 	tmp := map[string]PlanStateOutput{}
 	err := json.Unmarshal(b, &tmp)