fix: update messages in Forms using terraform. (#1088)

fix: update error messages in Forms using terraform.

Co-authored-by: Rajat Bajaj <[email protected]>

docs/resources/form.md

@@ -87,6 +87,11 @@ resource "auth0_form" "my_form" {
     }
   })
 
+  messages {
+    errors = jsonencode({
+      ERR_REQUIRED_PROPERTY = "This field is required for user kyc."
+    })
+  }
   languages {
     default = "en"
     primary = "en"

examples/resources/auth0_form/resource.tf

@@ -74,6 +74,11 @@ resource "auth0_form" "my_form" {
     }
   })
 
+  messages {
+    errors = jsonencode({
+      ERR_REQUIRED_PROPERTY = "This field is required for user kyc."
+    })
+  }
   languages {
     default = "en"
     primary = "en"

internal/auth0/form/expand.go

@@ -18,7 +18,10 @@ func expandForm(data *schema.ResourceData) (*management.Form, error) {
 
 	form.Name = value.String(cfg.GetAttr("name"))
 	form.Languages = expandFomLanguages(cfg.GetAttr("languages"))
-	form.Messages = expandFomMessages(cfg.GetAttr("messages"))
+
+	if data.HasChange("messages") {
+		form.Messages = expandFomMessages(cfg.GetAttr("messages"))
+	}
 
 	if data.HasChange("translations") {
 		translations, err := expandStringInterfaceMap(data, "translations")
@@ -157,16 +160,14 @@ func expandStringInterfaceMap(data *schema.ResourceData, key string) (map[string
 }
 
 func convertToInterfaceMap(rawValue cty.Value) *map[string]interface{} {
-	if rawValue.IsNull() || !rawValue.CanIterateElements() {
+	if rawValue.IsNull() {
 		return nil
 	}
 
 	m := make(map[string]interface{})
-	for key, value := range rawValue.AsValueMap() {
-		if value.IsNull() {
-			continue
-		}
-		m[key] = value
+	m, err := structure.ExpandJsonFromString(rawValue.AsString())
+	if err != nil {
+		return &m
 	}
 
 	return &m