How do you make an attribute required in lightning?
To make attribute as required use required=”true” in the tag. To make default value use default=”string or integer“.
What is a key field used for?
A Key field allows you to easily Reference the Record of another Form. This can be the Serial Number of a Record or a specific field which has been defined as a Key field. When you make a Date/Week/Month or any other time-related field a Key field you can use it to add Locks on Records more easily.
What is difference between unique and primary key?
A primary key is a column of table which uniquely identifies each tuple (row) in that table….Comparison Chart:
| Parameter | PRIMARY KEY | UNIQUE KEY |
|---|---|---|
| Number of keys that can be defined in the table | Only one primary key | More than one unique key |
| Index | Creates clustered index | Creates non-clustered index |
Why do you need a Keyfield attribute in Lightning?
KeyField attribute is required to identify the each row with a unique id and for better performance. We have a lot of attributes in lightning:datatable to perform sorting, resizing columns, giving custom width and row selection with checkboxes.
What is the Keyfield attribute of lighting data table?
The keyField attribute is required to hold unique row id. It associates each row with a unique identifier. You should always define keyField=”Id”which means row id will be same as record id and it will make easier to update, view and edit records.
What do you need to know about lightning DataTable?
A lightning:datatable component displays tabular data where each column can be displayed based on the data type. lightning:datatable also supports inline editing. lightning:datatable is not supported on mobile devices. Lightning Datatable Main Features Displaying and formatting of columns with appropriate data types Infinite scrolling of rows
How are columns sorted in lightning data table?
Sorting of columns by ascending and descending order Tables can be populated during initialization using the data, columns, and keyField attributes. The keyField attribute is required for correct table behavior. It will associate each row with a unique identifier.