cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
AccuFloDev
Advocate II
Advocate II

Help with LookUp Columns - CDS Entities returning null data for lookups in PowerApps

Hello,

 

I've posted about this twice before over the past month with no answer from anyone from Microsoft, and now my project is way behind.

I have a PowerApp Canvas App I'm developing with the new CDS for Apps.
One of my custom entities has six lookup columns which I'm trying to load into a form from a Gallery.

When I open an item from the Gallery in a Form, most of the time it WILL NOT load LookUp data.
When I try to display the lookup information in the "DefaultSelectedItems" function, it is blank because the lookup data is blank.

When I compare the data of the Entity Row to what's in the database, it shows values for the lookups.
However, in the app it is 'blank'.  

This issue comes and goes (sometimes it works, usually it does not) and I can't make heads or tails of it.

How can I query for a specific entity row and ensure that ALL the columns, including the lookup columns, have data in them?  Is this an issue that is Microsoft is aware of, or is it possibly something I'm doing wrong?

27 REPLIES 27

Hi @AccuFloDev 

I'm new with powerapps, thats why i need to reanimate this thread..

 


@AccuFloDev wrote:

 


In regards to my issue, I'm trying to improve performance of an app by making it work mostly offline until the user initiates a sync on demand. 


Could you please share me the formula for this part please?

Thanks,

 

BR.

pytbyt

 

 


@PytByt wrote:

Hi @AccuFloDev 

I'm new with powerapps, thats why i need to reanimate this thread..

 


@AccuFloDev wrote:

 


In regards to my issue, I'm trying to improve performance of an app by making it work mostly offline until the user initiates a sync on demand. 


Could you please share me the formula for this part please?

Thanks,

 

BR.

pytbyt

 

 


Hey @PytByt ,

The functionality I was describing isn't all in a single formula - could you be more specific as to the information you're looking for?  I'll try to provide what I can.

Hey @KelvinBox ,


I was unable to get the lookups to show using labels on a page prior to the call to Collect().
I was however able to get the lookups working using a slightly different method;
I may also have found an alternative to using First() that may have less of a hit on the device storage:

 

Here's a basic outline of the steps I used:

  1. On app launch, navigate to a 'splash' screen which will grab online data (if connected) through a series of buttons which iterate through all the entities I need to grab.

  2. On this same page, I have added forms for every entity with lookup values I need to pull in: 1-form-per-entity.
    Each form has DataCards for the following:

    1. A DataCard for each required lookup column.
      • Ensure that the Combo Box for the lookup field shows a value that is guaranteed to have data, such as the Id column of the lookup entity.

    2. A DataCard for the Entity's Id (The Entity with the lookup column, not the lookup's Id)
      This will reassure you that you are indeed getting entity data.

  3. Set the DataSource property of each form to a CDS Entity you need lookup columns for.

  4. On the Items property of each form, use code similar to the example below to pull in a single row.
    According to Microsoft the code is delegable , so hopefully this avoids the caching issue when using First()
    LookUp(
        'My Entity', //CDS Entity
        Not(IsBlank('My Entity Id')) //Get an item where the ID column isn't blank (This guarantees you get a result, if one exists - ID can't be blank)
    )
  5. (Optional) Set the Visibility of these forms to false unless some debug flag is active

  6. After data has been cached on the splash page, navigate to your app's first screen (where your galleries and forms should be).

This has worked to get the lookups showing consistently.  I am running into another issue now with having to Refresh() data sources twice before data comes in, but at least it's bringing in the Lookup values now.
(I will be creating a separate thread on the Refresh issue)

 

Anyway, if you have any questions on my methodology above please let me know.

Hi @AccuFloDev 

I need to know what formula is use to make the offline features. 

I mean, i already use the collection, and i also know about the SaveData and LoadData function. But i haven't really know how to use it and where to put it.

 

That's is why i'm interest in your solution which make the app work mostly offline until the user initiates a sync on demand.

 

I also need to know to automatically sync when Connection is connected.

 

Hope you could help.

 

Thank,

BR.

pytbyt


@PytByt wrote:

Hi @AccuFloDev 

I need to know what formula is use to make the offline features. 

I mean, i already use the collection, and i also know about the SaveData and LoadData function. But i haven't really know how to use it and where to put it.

 

That's is why i'm interest in your solution which make the app work mostly offline until the user initiates a sync on demand.

 

I also need to know to automatically sync when Connection is connected.

 

Hope you could help.

 

Thank,

BR.

pytbyt




Hey @PytByt ,

That's a bit of a loaded question, I'm not sure if I can provide you enough info here in the forums to cover that broad topic, but I can point you in the right direction to some blog articles on the subject take a look at these and let me know if you have any specific questions that aren't covered in the articles:

 

  1. Implementing Offline Capabilities for Relational Data
  2. Implementing Offline Capabilities in your App
  3. Develop offline-capable canvas apps

 

In regards to:

I also need to know to automatically sync when Connection is connected.


There are probably a lot of ways to do this, but my preferred method is to have a button on the apps 'main' screen which runs the 'sync' code.  You could trigger this in a couple of ways:

 

  1. Use the Screens OnVisible property to detect if connected and if so, click the sync button.
    This will have the behaviour of syncing when the screen first loads when the device is connected:
    //Screens OnVisible Property
    If(
      Connection.Connected,
      Select('Sync Button');
    );
  2. To have a screen automatically detect a change in the connection state then run the sync, you could use a Toggle control on the page you wish to do that on, set up something like this:

    *Disclaimer - I haven't tested this code to see if it works, please let me know if you have issues*
    //Toggle Control 'Default' Property
    Connection.Connected
    //Toggle Control 'OnCheck' Property
    //This code will run only when the connection state changes from false to true
    Select('Sync Button');
    You can then set the Visible property of the toggle to false to the users can't manually change the toggle.
alexis
Frequent Visitor

I'm facing the same issue here.

It's the first time I use the CDS and I just spent the day trying to figure out why it does not work.

I tried the First(Filter()) solution but it does not work better.

 

I can't use the Gallery control solution so I don't really know what to do from here.

 

Any updates from Microsoft on when the issue would be resolved ?

 

Thanks

I think the response from @AccuFloDev to me above is still relevant and hasn’t changed unfortunately. 

if you provide specific examples of what you’re doing we can probably help 🙂

Hi,

Yes here's a bit more context:
My tables are: Employees and JobType and the relationship between the 2 tables is:
alexis_0-1605714534995.jpeg

 

 
The issue is when I request a row from the Employee table using the LookUp() or First(Filter()) functions, the Lookup Columns retrieved are always Blank() although there is data in it. I tried getting the result from OnStart, OnVisible, OnSelect, into a global or a local variable and the result is the same every time. All LookUp Columns are always Blank(), No Exceptions.

I'll try the solution from @AccuFloDev  using the Spash Screen. 
By the way, how are the refreshed handled using this solution ?

Thanks

Helpful resources

Announcements

Celebrating the May Super User of the Month: Laurens Martens

  @LaurensM  is an exceptional contributor to the Power Platform Community. Super Users like Laurens inspire others through their example, encouragement, and active participation. We are excited to celebrated Laurens as our Super User of the Month for May 2024.   Consistent Engagement:  He consistently engages with the community by answering forum questions, sharing insights, and providing solutions. Laurens dedication helps other users find answers and overcome challenges.   Community Expertise: As a Super User, Laurens plays a crucial role in maintaining a knowledge sharing environment. Always ensuring a positive experience for everyone.   Leadership: He shares valuable insights on community growth, engagement, and future trends. Their contributions help shape the Power Platform Community.   Congratulations, Laurens Martens, for your outstanding work! Keep inspiring others and making a difference in the community!   Keep up the fantastic work!        

Check out the Copilot Studio Cookbook today!

We are excited to announce our new Copilot Cookbook Gallery in the Copilot Studio Community. We can't wait for you to share your expertise and your experience!    Join us for an amazing opportunity where you'll be one of the first to contribute to the Copilot Cookbook—your ultimate guide to mastering Microsoft Copilot. Whether you're seeking inspiration or grappling with a challenge while crafting apps, you probably already know that Copilot Cookbook is your reliable assistant, offering a wealth of tips and tricks at your fingertips--and we want you to add your expertise. What can you "cook" up?   Click this link to get started: https://aka.ms/CS_Copilot_Cookbook_Gallery   Don't miss out on this exclusive opportunity to be one of the first in the Community to share your app creation journey with Copilot. We'll be announcing a Cookbook Challenge very soon and want to make sure you one of the first "cooks" in the kitchen.   Don't miss your moment--start submitting in the Copilot Cookbook Gallery today!     Thank you,  Engagement Team

Announcing Power Apps Copilot Cookbook Gallery

We are excited to share that the all-new Copilot Cookbook Gallery for Power Apps is now available in the Power Apps Community, full of tips and tricks on how to best use Microsoft Copilot as you develop and create in Power Apps. The new Copilot Cookbook is your go-to resource when you need inspiration--or when you're stuck--and aren't sure how to best partner with Copilot while creating apps.   Whether you're looking for the best prompts or just want to know about responsible AI use, visit Copilot Cookbook for regular updates you can rely on--while also serving up some of your greatest tips and tricks for the Community. Check Out the new Copilot Cookbook for Power Apps today: Copilot Cookbook - Power Platform Community.  We can't wait to see what you "cook" up!      

Tuesday Tip | How to Report Spam in Our Community

It's time for another TUESDAY TIPS, your weekly connection with the most insightful tips and tricks that empower both newcomers and veterans in the Power Platform Community! Every Tuesday, we bring you a curated selection of the finest advice, distilled from the resources and tools in the Community. Whether you’re a seasoned member or just getting started, Tuesday Tips are the perfect compass guiding you across the dynamic landscape of the Power Platform Community.   As our community family expands each week, we revisit our essential tools, tips, and tricks to ensure you’re well-versed in the community’s pulse. Keep an eye on the News & Announcements for your weekly Tuesday Tips—you never know what you may learn!   Today's Tip: How to Report Spam in Our Community We strive to maintain a professional and helpful community, and part of that effort involves keeping our platform free of spam. If you encounter a post that you believe is spam, please follow these steps to report it: Locate the Post: Find the post in question within the community.Kebab Menu: Click on the "Kebab" menu | 3 Dots, on the top right of the post.Report Inappropriate Content: Select "Report Inappropriate Content" from the menu.Submit Report: Fill out any necessary details on the form and submit your report.   Our community team will review the report and take appropriate action to ensure our community remains a valuable resource for everyone.   Thank you for helping us keep the community clean and useful!

Community Roundup: A Look Back at Our Last 10 Tuesday Tips

As we continue to grow and learn together, it's important to reflect on the valuable insights we've shared. For today's #TuesdayTip, we're excited to take a moment to look back at the last 10 tips we've shared in case you missed any or want to revisit them. Thanks for your incredible support for this series--we're so glad it was able to help so many of you navigate your community experience!   Getting Started in the Community An overview of everything you need to know about navigating the community on one page!  Community Links: ○ Power Apps ○ Power Automate  ○ Power Pages  ○ Copilot Studio    Community Ranks and YOU Have you ever wondered how your fellow community members ascend the ranks within our community? We explain everything about ranks and how to achieve points so you can climb up in the rankings! Community Links: ○ Power Apps ○ Power Automate  ○ Power Pages  ○ Copilot Studio    Powering Up Your Community Profile Your Community User Profile is how the Community knows you--so it's essential that it works the way you need it to! From changing your username to updating contact information, this Knowledge Base Article is your best resource for powering up your profile. Community Links: ○ Power Apps ○ Power Automate  ○ Power Pages  ○ Copilot Studio    Community Blogs--A Great Place to Start There's so much you'll discover in the Community Blogs, and we hope you'll check them out today!  Community Links: ○ Power Apps ○ Power Automate  ○ Power Pages  ○ Copilot Studio    Unlocking Community Achievements and Earning Badges Across the Communities, you'll see badges on users profile that recognize and reward their engagement and contributions. Check out some details on Community badges--and find out more in the detailed link at the end of the article! Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio    Blogging in the Community Interested in blogging? Everything you need to know on writing blogs in our four communities! Get started blogging across the Power Platform communities today! Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio   Subscriptions & Notifications We don't want you to miss a thing in the community! Read all about how to subscribe to sections of our forums and how to setup your notifications! Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio   Getting Started with Private Messages & Macros Do you want to enhance your communication in the Community and streamline your interactions? One of the best ways to do this is to ensure you are using Private Messaging--and the ever-handy macros that are available to you as a Community member! Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio   Community User Groups Learn everything about being part of, starting, or leading a User Group in the Power Platform Community. Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio   Update Your Community Profile Today! Keep your community profile up to date which is essential for staying connected and engaged with the community. Community Links: ○ Power Apps  ○ Power Automate  ○ Power Pages  ○ Copilot Studio   Thank you for being an integral part of our journey.   Here's to many more Tuesday Tips as we pave the way for a brighter, more connected future! As always, watch the News & Announcements for the next set of tips, coming soon!

Hear what's next for the Power Up Program

Hear from Principal Program Manager, Dimpi Gandhi, to discover the latest enhancements to the Microsoft #PowerUpProgram, including a new accelerated video-based curriculum crafted with the expertise of Microsoft MVPs, Rory Neary and Charlie Phipps-Bennett. If you’d like to hear what’s coming next, click the link below to sign up today! https://aka.ms/PowerUp  

Users online (3,583)