Using nestedFields to Audit Entry History

Liferay 7.4 U72+/GA72+

When you enable entry history for an object definition, you can use the nestedFields parameter with REST APIs to audit entry events. Add nestedFields=auditEvents to the path for GET requests (e.g., http://localhost:8080/o/c/tickets/?nestedFields=auditEvents).

To get started, set up a new Liferay 7.4 instance and prepare the provided tutorial code. Then, run the scripts to create entries, update them, and query those changes using the nestedFields parameter.

Important

Using REST APIs to view an entry’s history requires both the View and Object Entry History permissions for the entry. See Permissions Framework Integration.

Setting Up a Liferay Instance

Start a new Liferay instance by running

docker run -it -m 8g -p 8080:8080 liferay/portal:7.4.3.112-ga112

Sign in to Liferay at http://localhost:8080. Use the email address [e-mail] and the password test. When prompted, change the password to learn.

Next, enable Liferay’s persistent audit message processor. Then create and publish an object definition.

Enabling the Persistent Audit Message Processor

1. Open the Global Menu () → Control Panel tab, → System Settings.

2. Under Security, click Audit and go to the Persistent Message Audit Message Processor tab.

3. Check Enabled.

4. Click Save.

   

Creating the Object Definition

1. Open the Global Menu (), go to the Control Panel tab, and click Objects.

2. Create an object draft.

   Field	Value
   Label	Able
   Plural Label	Ables
   Name	Able

3. Add this field to the draft.

   Label	Field Name	Type	Required
   Name	name	Text	✔

4. In the Details tab, toggle Enable Entry History.

5. Publish the object.

Once published, you can access the object via Headless APIs.

Preparing the Sample Code

Download and unzip the sample code:

curl https://resources.learn.liferay.com/dxp/latest/en/building-applications/objects/understanding-object-integrations/using-custom-object-apis/liferay-g4m3.zip -O

unzip liferay-g4m3.zip

The sample code includes shell scripts for creating, updating, and querying object entries.

Tip

For a complete list of APIs generated for site and company objects, see Objects Headless Framework Integration. You can view and test custom object APIs via the Liferay API Explorer at [server]:[port]/o/api (e.g., localhost:8080/o/api). Click REST Applications and select an API.

Using the Sample Code

1. Navigate to the curl folder in the liferay-g4m3 project.

   cd liferay-g4m3/curl
   

2. Execute Able_POST_ToCompany to create three Able entries.

   ./Able_POST_ToCompany.sh
   

   {
     ...
     "externalReferenceCode" : "able-one",
     "id" : 47512,
     ...
     "name" : "Able 1 - Foo"
   }
   
   {
     ...
     "externalReferenceCode" : "able-two",
     "id" : 47514,
     ...
     "name" : "Able 2 - Foo"
   }
   
   {
     ...
     "externalReferenceCode" : "able-three",
     "id" : 47516,
     ...
     "name" : "Able 3 - Foo"
   }
   

3. Execute Able_PATCH_ByExternalReferenceCode with the able-one ERC.

   ./Able_PATCH_ByExternalReferenceCode.sh able-one
   

   This updates the entry’s name field twice.

   {
     ...
     "externalReferenceCode" : "able-one",
     "id" : 47512,
     ...
     "name" : "Able 1 - Bar"
   }
   
   {
     ...
     "externalReferenceCode" : "able-one",
     "id" : 47512,
     ...
     "name" : "Able 1 - Goo"
   }
   

4. Execute Able_GET_ByExternalReferenceCode with the able-one ERC.

   ./Able_GET_ByExternalReferenceCode.sh able-one
   

   This returns the able-one entry with the auditEvents array, a history of the entries events, beginning with the most recent event and ending with the entry’s creation.

   {
     ...
     "auditEvents" : [ {
       "auditFieldChanges" : [ {
         "name" : "name",
         "newValue" : "Able 1 - Goo",
         "oldValue" : "Able 1 - Bar"
       } ],
       "dateCreated" : "2023-05-04T05:44:41Z",
       "eventType" : "UPDATE"
     }, {
       "auditFieldChanges" : [ {
         "name" : "name",
         "newValue" : "Able 1 - Bar",
         "oldValue" : "Able 1 - Foo"
       } ],
       "dateCreated" : "2023-05-04T05:44:40Z",
       "eventType" : "UPDATE"
     }, {
       "auditFieldChanges" : [ {
         "name" : "name",
         "newValue" : "Able 1 - Foo"
       } ],
       "dateCreated" : "2023-05-04T05:44:37Z",
       "eventType" : "ADD"
     } ],
     ...
     "externalReferenceCode" : "able-one",
     "id" : 47512,
     ...
     "name" : "Able 1 - Goo"
   }
   

   The auditEvents array includes these elements:

   • auditFieldChanges: The updated field, with its new and old values.
   • dateCreated: The time and date of the event.
   • eventType: The event type (e.g., ADD, UPDATE, DELETE).

5. Execute Ables_GET_FromCompany.

   ./Ables_GET_FromCompany.sh able-one
   

   This returns all Able entries with an audit of their events, beginning with the most recent event.

   {
     ...
     "items" : [ {
       ...
       "auditEvents" : [ {
         "auditFieldChanges" : [ {
           "name" : "name",
           "newValue" : "Able 2 - Foo"
         } ],
         "dateCreated" : "2023-05-04T06:15:50Z",
         "eventType" : "ADD"
       } ],
       ...
       "externalReferenceCode" : "able-two",
       "id" : 47514,
       ...
       "name" : "Able 2 - Foo"
     }, {
       ...
       "auditEvents" : [ {
         "auditFieldChanges" : [ {
           "name" : "name",
           "newValue" : "Able 3 - Foo"
         } ],
         "dateCreated" : "2023-05-04T06:15:51Z",
         "eventType" : "ADD"
       } ],
       ...
       "externalReferenceCode" : "able-three",
       "id" : 47516,
       ...
       "name" : "Able 3 - Foo"
     }, {
       ...
       "auditEvents" : [ {
         "auditFieldChanges" : [ {
           "name" : "name",
           "newValue" : "Able 1 - Goo",
           "oldValue" : "Able 1 - Bar"
         } ],
         "dateCreated" : "2023-05-04T06:16:25Z",
         "eventType" : "UPDATE"
       }, {
         "auditFieldChanges" : [ {
           "name" : "name",
           "newValue" : "Able 1 - Bar",
           "oldValue" : "Able 1 - Foo"
         } ],
         "dateCreated" : "2023-05-04T06:16:24Z",
         "eventType" : "UPDATE"
       }, {
         "auditFieldChanges" : [ {
           "name" : "name",
           "newValue" : "Able 1 - Foo"
         } ],
         "dateCreated" : "2023-05-04T06:15:49Z",
         "eventType" : "ADD"
       } ],
       ...
       "externalReferenceCode" : "able-one",
       "id" : 47512,
       ...
       "name" : "Able 1 - Goo"
     } ],
     "lastPage" : 1,
     "page" : 1,
     "pageSize" : 20,
     "totalCount" : 3
   }
   

Examining the GET Requests

These GET requests include the nestedFields=auditEvents parameter in their URLs.

Able_GET_ByExternalReferenceCode

curl \
	"http://localhost:8080/o/c/ables/by-external-reference-code/${1}?nestedFields=auditEvents" \
	--user "[e-mail]:learn"

Ables_GET_FromCompany

curl \
	"http://localhost:8080/o/c/ables/?nestedFields=auditEvents" \
	--user "[e-mail]:learn"

Related Topics

• Auditing Object Events
• Using nestedFields to Query Related Entries