Solving Pagination Issues in Angular Mat Tables with Multiple Data Sources

Learn how to effectively implement pagination in Angular Material tables with multiple tables in a single component, overcoming common challenges and ensuring smooth data handling.
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Solving Pagination Issues in Angular Mat Tables with Multiple Data Sources

When working with Angular, especially with Angular Material, one common challenge developers encounter is implementing pagination across multiple tables within the same component. If you've found yourself stuck on this issue, you're not alone. Let's dive into a practical approach that will help you implement pagination effectively across multiple data sources.

Understanding the Problem

Imagine you are rendering five different tables in an Angular component, with data fetched from a remote API using a GET call. You've set up pagination controls that seem functional – you can change the page size and navigate through pages – but the table data remains static, only displaying the initial set of five records. This can be frustrating, especially after spending hours troubleshooting without success.

Key Indicators of the Problem:

Pagination controls are responsive, but the displayed data doesn't change.

You can see the correct total record count but can't view additional records.

The implementation might not correctly bind the MatPaginator to the respective tables.

Step-by-Step Solution

Here’s how to effectively harness the power of Angular Material's paginator in your tables.

Step 1: Set Up Paginator Alias in HTML

To begin with, ensure that each mat-paginator in your HTML is assigned a unique template reference variable. This is crucial as it allows you to identify which paginator is associated with which data source.

Here’s an example of how to set it up for one of your tables:

[[See Video to Reveal this Text or Code Snippet]]

Repeat this for all your tables by using unique paginator references like # paginatorGSTN, # paginatorPHYS, and so forth.

Step 2: Bind Paginators in Your Component

Next, ensure that you correctly bind these paginator references in your TypeScript component using @ ViewChild. The binding should look like this:

[[See Video to Reveal this Text or Code Snippet]]

This establishes a direct reference to the corresponding paginator in your TypeScript code.

Step 3: Link the Paginator to Your Data Source

With the paginators correctly set up, the final step is to bind them to the respective MatTableDataSource when you fetch your data. Make sure this binding happens in the subscription of your data-fetching function:

[[See Video to Reveal this Text or Code Snippet]]

Repeat this for your other data sources as required.

Final Thoughts

After implementing these changes, your pagination should work across all the tables without issue. This structured approach not only ensures smooth pagination but also teaches you the importance of correctly binding components in Angular.

If you find yourself stuck in similar situations in the future, always check if you've correctly set up your paginator aliases, their bindings in TypeScript, and the integration with your data sources. Happy coding!