[0.5.x] Use specified key for error key (#97)

* Use specified key for error key

* lint

Author: timacdonald

packages/vue-inertia/src/index.ts

@@ -116,7 +116,7 @@ export const useForm = <Data extends Record<string, unknown>>(method: RequestMet
                     throw new Error('The `value` is required.')
                 }
 
-                errors = { key: value }
+                errors = { [key]: value }
             } else {
                 errors = key
             }

packages/vue-inertia/tests/index.test.ts

@@ -101,3 +101,13 @@ it('transforms data for validation requests', () => {
     expect(form.emails).toBe('taylor@laravel.com, tim@laravel.com')
     expect(form.data().emails).toBe('taylor@laravel.com, tim@laravel.com')
 })
+
+it('can set individual errors', function () {
+    const form = useForm('post', '/register', {
+        name: '',
+    })
+
+    form.setError('name', 'The name is required.')
+
+    expect(form.errors.name).toBe('The name is required.')
+})