Building a Time Off Requester

Liferay 7.4+

With Liferay Objects, you can build entire applications without writing code or deploying modules. Here, you’ll create a Time Off Request application using Liferay Objects and Picklists.

First, you’ll add a Picklist for defining department values. Then, you’ll create two Objects, one for Time Off Requests and another for Employees. During this process, you’ll relate these Objects to one another and add a webhook to the Time Off Request Object. Finally, you’ll design custom layouts to display the relationship fields.

note

Because of limitations with extending system Objects, you must create an Employee Object to relate requests with user profiles.

Start a new Liferay DXP instance by running

docker run -it -m 8g -p 8080:8080

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

Adding a Department Picklist

Your Picklist represents company departments:

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

2. Click the Add button (), enter Department for name, and click Save.

3. Select the new Picklist and use the Add button () to add items to it (e.g., Marketing, Human Resources, Sales).

   

You can now use the Picklist as a field in the Time Off Request Object.

Adding a Time Off Request Object

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

2. Click the Add button ( ) and enter these values.

   Field	Value
   Label	Time Off Request
   Plural Label	Time Off Requests
   Object Name	TimeOffRequest

3. Select the Object, click the Fields tab, and add these four fields.

   Label	Field Name	Type	Picklist	Required
   Start Date	startDate	Date	n/a	✔
   End Date	endDate	Date	n/a
   Department	department	Picklist	Department	✔
   Comments	comments	Text	n/a

   

4. Click the Actions tab and add this action.

   Field	Value
   Action Name	Creation Sync
   When	On After Add
   Then	Webhook
   URL	Enter a test webhook URL from either your app or a site like, https://webhook.site.

   This action sends data to an external system whenever Time Off Request entries are added. See Defining Actions for more information.

   

5. Click the Details tab and set the following Entry Display and Scope settings.

   Field	Value
   Title Field	Start Date
   Scope	Company
   Panel Link	Applications > Communication

6. Click Publish. This activates the Object.

Next, you’ll create an Employee Object and relate it to the Time Off Request Object, so you can associate request entries with individual users.

Adding an Employee Object

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

2. Click the Add button ( ) and enter these values.

   Field	Value
   Label	Employee
   Plural Label	Employees
   Object Name	Employee

3. Select the Object, click the Fields tab, and add these fields.

   Label	Field Name	Type	Required
   Name	name	Text	✔
   Email	email	Text	✔

   

4. Click the Relationships tab and add this relationship.

   Field	Value
   Label	Requester
   Relationship Name	requester
   Type	One to Many
   Object	TimeOffRequest

   note

   When you create this relationship, you add a foreign key field automatically to the Time Off Request Object.

   

5. Click the Details tab and set the following Entry Display and Scope settings.

   Field	Value
   Title Field	Name
   Scope	Company
   Panel Link	Control Panel > Users

6. Click Publish.

Once published, you can create entries via the Liferay UI or Headless APIs. However, to relate these entries to request entries, you must first create a custom layout.

Designing Custom Object Layouts

Object layouts determine how fields are organized when creating and editing Object entries. Since relationships are not displayed in default Object layouts, you must design custom layouts for both Objects to display their relationship fields.

For Time Off Requests

1. Navigate to the Objects application and select the Time Off Request Object.

2. Click the Layouts tab, click the Add button ( ), enter Request for name, and click Save.

3. Select the new Layout and check the Mark as Default box.

   

4. Click the Layout tab and add a tab with two blocks.

   Element	Label	Type
   Tab	Request Info	Fields
   Block	Dates	n/a
   Block	Details	n/a

5. Add fields to the blocks.

   Block	Fields
   Dates	Start Date, End Date
   Details	Department, Employee, Comments

   

6. Click Save.

Once saved, the new layout is used in the Liferay UI for creating and editing Time Off Request entries. If employee entries exist, you can relate them to individual requests.

For Employees

1. Navigate to the Objects application and select the Employee Object.

2. Click the Layouts tab, click the Add button ( ), enter Employee Info for name, and click Save.

3. Select the new Layout and check the Mark as Default box.

4. Click the Layout tab and add a Fields tab with one block.

   Element	Label	Type
   Tab	Basic Details	Fields
   Block	Employee Info	n/a

5. Add the Name and Email fields to the block.

6. Add a Relationship tab for the Employee Object’s Requester relationship.

   Element	Label	Type	Relationship
   Tab	Time Off Requests	Relationships	Requester

   

7. Click Save.

Once saved, the new layout is used in the Liferay UI for creating and editing employee entries. If request entries exist, you can relate them to employee entries in the Time Off Requests tab. Here, you can also view all requests related to the select employee entry.

Adding Object Entries

Now that your app is complete, you can use the Liferay UI and Headless APIs to add data to the Time Off Request and Employee Objects.

Adding Employees

Follow these steps to add employee entries using Headless APIs:

1. Open Liferay’s API Explorer (i.e., localhost:8080/o/api), click the REST Applications drop-down menu, and click c/employees.

2. Enter this script into the request body for the batch POST API.

   [
     {
       "email": "[e-mail]",
       "name": "Able"
     },
     {
       "email": "[e-mail]",
       "name": "Baker"
     },
     {
       "email": "[e-mail]",
       "name": "Charlie"
     }
   ]
   

3. Click Execute.

This adds three entries to the Employee Object.

Adding Time Off Requests

Follow these steps to add request entries via the Liferay UI:

1. Open the Global Menu (), click the Applications tab, and select Time Off Requests.

2. Click the Add button () and fill out the form

3. Click Save.

After saving an entry, you see the entry’s edit screen. To add more entries, return to the Time Off Requests main page. When time requests are added, the Object’s webhook is triggered and posts the entry’s data to the set URL.

Once requests are added and related to employee entries, you can view them in the Employees application. Open the Global Menu (), go to the Control Panel tab, and click Employees. Select the related entry and click the Time Off Requests tab.

Related Topics

• Objects Overview
• Creating Objects
• Creating Picklists