[React] Improvements to API forms (#5742)

* Remove read_only field from API OPTIONS

- 'read_only' is a reserved field for some Mantine components

* Fixing further errors for related field model

* Handle bad values for numericalValue

* Fix for default values for API forms

* Fix for choice field

- Do not set form default value when constructing element

* Tweak for PartDetail page

src/frontend/src/components/forms/ApiForm.tsx

@@ -136,13 +136,19 @@ export function ApiForm({
   useEffect(() => {
     // Provide initial form data
     Object.entries(props.fields ?? {}).forEach(([fieldName, field]) => {
-      if (field.value !== undefined) {
+      // fieldDefinition is supplied by the API, and can serve as a backup
+      let fieldDefinition = fieldDefinitions[fieldName] ?? {};
+
+      let v =
+        field.value ??
+        field.default ??
+        fieldDefinition.value ??
+        fieldDefinition.default ??
+        undefined;
+
+      if (v !== undefined) {
         form.setValues({
-          [fieldName]: field.value
-        });
-      } else if (field.default !== undefined) {
-        form.setValues({
-          [fieldName]: field.default
+          [fieldName]: v
         });
       }
     });

src/frontend/src/components/forms/fields/ApiFormField.tsx

@@ -68,6 +68,7 @@ export type ApiFormFieldType = {
   choices?: any[];
   hidden?: boolean;
   disabled?: boolean;
+  read_only?: boolean;
   placeholder?: string;
   description?: string;
   preFieldContent?: JSX.Element | (() => JSX.Element);
@@ -115,6 +116,10 @@ export function constructField({
       break;
   }
 
+  // Clear out the 'read_only' attribute
+  def.disabled = def.disabled ?? def.read_only ?? false;
+  delete def['read_only'];
+
   return def;
 }
 
@@ -190,16 +195,26 @@ export function ApiFormField({
 
   // Coerce the value to a numerical value
   const numericalValue: number | undefined = useMemo(() => {
+    let val = 0;
+
     switch (definition.field_type) {
       case 'integer':
-        return parseInt(value);
+        val = parseInt(value) ?? 0;
+        break;
       case 'decimal':
       case 'float':
       case 'number':
-        return parseFloat(value);
+        val = parseFloat(value) ?? 0;
+        break;
       default:
-        return undefined;
+        break;
     }
+
+    if (isNaN(val) || !isFinite(val)) {
+      val = 0;
+    }
+
+    return val;
   }, [value]);
 
   // Construct the individual field

src/frontend/src/components/forms/fields/ChoiceField.tsx

@@ -34,8 +34,6 @@ export function ChoiceField({
       definitions: definitions
     });
 
-    form.setValues({ [fieldName]: def.value ?? def.default });
-
     return def;
   }, [fieldName, field, definitions]);
 

src/frontend/src/components/forms/fields/RelatedModelField.tsx

@@ -37,16 +37,18 @@ export function RelatedModelField({
 
   // Extract field definition from provided data
   // Where user has provided specific data, override the API definition
-  const definition: ApiFormFieldType = useMemo(
-    () =>
-      constructField({
-        form: form,
-        field: field,
-        fieldName: fieldName,
-        definitions: definitions
-      }),
-    [form.values, field, definitions]
-  );
+  const definition: ApiFormFieldType = useMemo(() => {
+    let def = constructField({
+      form: form,
+      field: field,
+      fieldName: fieldName,
+      definitions: definitions
+    });
+
+    // Remove the 'read_only' attribute (causes issues with Mantine)
+    delete def['read_only'];
+    return def;
+  }, [form.values, field, definitions]);
 
   // Keep track of the primary key value for this field
   const [pk, setPk] = useState<number | null>(null);
@@ -170,8 +172,20 @@ export function RelatedModelField({
     }
   }
 
+  /* Construct a "cut-down" version of the definition,
+   * which does not include any attributes that the lower components do not recognize
+   */
+  const fieldDefinition = useMemo(() => {
+    return {
+      ...definition,
+      onValueChange: undefined,
+      adjustFilters: undefined,
+      read_only: undefined
+    };
+  }, [definition]);
+
   return (
-    <Input.Wrapper {...definition} error={error}>
+    <Input.Wrapper {...fieldDefinition} error={error}>
       <Select
         id={fieldId}
         value={pk != null && data.find((item) => item.value == pk)}

src/frontend/src/functions/forms.tsx

@@ -69,8 +69,12 @@ export function extractAvailableFields(
       name: fieldName,
       field_type: field.type,
       description: field.help_text,
-      value: field.value ?? field.default
+      value: field.value ?? field.default,
+      disabled: field.read_only ?? false
     };
+
+    // Remove the 'read_only' field - plays havoc with react components
+    delete fields['read_only'];
   }
 
   return fields;

src/frontend/src/pages/part/PartDetail.tsx

@@ -180,7 +180,7 @@ export default function PartDetail() {
         )
       }
     ];
-  }, [part]);
+  }, [id, part]);
 
   const breadcrumbs = useMemo(
     () => [