Add a method allowing to retrieve a field by name

src/action.ts

@@ -38,7 +38,6 @@ export interface ActionInfo {
    * Returns the list of fields associated to an action
    */
   fields: Field[];
-
 }
 
 /**
@@ -51,6 +50,10 @@ export interface Action<T extends Record<string, any> = Record<string, any>> ext
    */
   submit(formData: T): Promise<State>;
 
+  /**
+   * Return a field by name.
+   */
+  field(name: string): Field | undefined;
 }
 
 export class SimpleAction<TFormData extends Record<string, any>> implements Action {
@@ -157,6 +160,10 @@ export class SimpleAction<TFormData extends Record<string, any>> implements Acti
     return state;
 
   }
+
+  field(name: string): Field | undefined {
+    return this.fields.find(field => field.name === name);
+  }
 }
 
 export class ActionNotFound extends Error {}

test/unit/state/hal-forms.ts

@@ -3,7 +3,7 @@ import { factory } from '../../../src/state/hal';
 import { Action, Client, Field } from '../../../src';
 import { HalFormsProperty } from 'hal-types';
 
-type CompareAction = Omit<Action, 'submit'>;
+type CompareAction = Omit<Omit<Action, 'submit'>, 'field'>;
 
 describe('HAL forms', () => {