Control Required Field Record For Free

On your Text Box field is an option to make the field required. If you set that to true, and then under component visibility set this Text Box to only appear if your picklist = Buy, what will happen is that the field will be hidden until. At that time, the text box will appear, and it will be required.

Select the field that you want to require always has a value. In the Field Properties pane, on the General tab, set the Required property to Yes.

One can make field mandatory through Visualforce.

In the Navigation Pane, right-click the table and then click Design View. Select the field that you want to require always has a value. In the Field Properties pane, on the General tab, set the Required property to Yes.

Click the field name to access a field's properties. Click Advanced to expand the section. In the Permissions section of the page, select the Restrict access by role checkbox. Select one of the following access levels from the list for each role: None. View. Modify. Click Save.

Make a Standard field 'Required' by using Page Layout in Lightning Experience User Interface: Click Setup. Click Object and fields. Select Object Manager. Select Object. Click Page layout. Edit 'Layout' and make the field to Required.

There are 3 ways to make custom fields required.... Click on gear icon then Setup > Object Manager. Choose the object > Page Layouts. Select the page layout that you use on the object. Click on the wrench icon beside the custom field that you will make required. Select the Required checkbox. Click on Ok, then click on Save.