cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
AD1990
Helper II
Helper II

Lookup function not working where I try to compare with multiple columns in sharepoint list

Hi,

My table 'Tuition' will have the tuition details.

Student ID(Text type), Student Name(Person type), Student Email(Person type), Teacher ID(Text type), Teacher Name(Person type), Teacher Email(Person type), Tuition Subject(Choice type), Tuition Status(Choice type), Start Date(Date type), End Date(Date Type).

 

Teacher can offer multiple subjects but one student can apply only once to the teacher for a subject, i.e. Chemistry.

Student cannot apply to the same teacher for subject chemistry, but can apply for physics if the teacher has that subject available for tuitions.

Because of this, my 'Tuition' table will have multiple rows with the same student and teacher data but only the subject will be unique to each row.

When the teacher approves the tuition(by clicking the button), the 'tuition status' field will change from 'applied' to 'ongoing'. And the gallery row should disappear from the 'applied' section of the screen. 

Patch function I wrote is:

 

Patch
(
'Tuition',
LookUp('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID && Student_ID=Gallery9_1.Selected.Student_ID && Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value)),
{
Tuition_Status: {Value: "Ongoing"},
Start_Date: Now()
}
);

Refresh('Tuition')

 

The problem here is probably the Lookup function is unable to locate the exact row cause the clause(highlighted and is in italics)

is not working/updating the data. It doesn't throw an error.
What change should I make? 

9 REPLIES 9
Nogueira1306
Super User
Super User

Patch
(
'Tuition',
LookUp('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID && Student_ID=Gallery9_1.Selected.Student_ID, Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value)),
{
Tuition_Status: {Value: "Ongoing"},
Start_Date: Now()
}
);

Refresh('Tuition')

 

If you need additional help please tag me in your reply and please like my reply.
If my reply provided you with a solution, pleased mark it as a solution ✔️!

Best regards,
Gonçalo Nogueira

Check my LinkedIn!

Check my User Group (pt-PT)!

Last Post on Community

My website!

AD1990
Helper II
Helper II

@Nogueira1306 

AD1990_1-1638188047806.png

AD1990_2-1638188125546.png

I tried what you suggested but I am getting the above error.

My mistake, sorry

 

Patch
(
'Tuition',
LookUp('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID , Student_ID=Gallery9_1.Selected.Student_ID, Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value)),
{
Tuition_Status: {Value: "Ongoing"},
Start_Date: Now()
}
);

Refresh('Tuition')



If you need additional help please tag me in your reply and please like my reply.
If my reply provided you with a solution, pleased mark it as a solution ✔️!

Best regards,
Gonçalo Nogueira

Check my LinkedIn!

Check my User Group (pt-PT)!

Last Post on Community

My website!

@Nogueira1306 
Still error. Invalid number of arguments.

AD1990_0-1638188580346.png

I have also tried putting in semi colon to differentiate the fields in the second argument inside the Lookup function. But it's of no use.

 

I forgot that is a Lookup...

Okay, try this,


Patch
(
'Tuition',
First(Filter('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID , Student_ID=Gallery9_1.Selected.Student_ID, Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value))),
{
Tuition_Status: {Value: "Ongoing"},
Start_Date: Now()
}
);

Refresh('Tuition')

 

If you need additional help please tag me in your reply and please like my reply.
If my reply provided you with a solution, pleased mark it as a solution ✔️!

Best regards,
Gonçalo Nogueira

Check my LinkedIn!

Check my User Group (pt-PT)!

Last Post on Community

My website!

RandyHayes
Super User
Super User

@AD1990 

Your formula is in general correct.  Avoid using a First(Filter combination in your formulas as this will impact your performance and wastes resources as the Filter will iterate on ALL records and then First will return just one.

LookUp is the correct formula to use.

I would consider the following change to your formula:

Patch('Tuition',
    LookUp('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID && 
           Student_ID=Gallery9_1.Selected.Student_ID && 
           (Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value))
    ),
    {
        Tuition_Status: {Value: "Ongoing"},
        Start_Date: Now()
    }
);

Two things here:

1) In the formula the two Lower functions are surrounded by parens as sometimes PowerApps infers its own order of precedence for the And operations.  This will ensure that the two lowers are evaluated and the result of that (true or false) is then And'ed with the rest.

2) Avoid using Refresh on your Datasource.  It will *already* have the updated data that you just submitted in the Patch.  Refreshing it will only slow down your app to regather the datasource again in your session table.  Not needed because it already has it.

 

I hope this is helpful for you.

_____________________________________________________________________________________
Digging it? - Click on the Thumbs Up below. Solved your problem? - Click on Accept as Solution below. Others seeking the same answers will be happy you did.
NOTE: My normal response times will be Mon to Fri from 1 PM to 10 PM UTC (and lots of other times too!)
Check out my PowerApps Videos too! And, follow me on Twitter @RandyHayes

Really want to show your appreciation? Buy Me A Cup Of Coffee!
AD1990
Helper II
Helper II

@Nogueira1306 @RandyHayes 

I think inherently nothing is wrong with my formula(as mentioned by Randy Hayes) and neither is anything wrong with the formulas provided by you two. 
I think, the permutation of teacher_id, student_id and tuition-subject is not able to exactly pin point the specific row in the sharepoint list. To me, those three should be more than enough to uniquely identify the row, but Powerapps is unable to do so. So either my list has more that one rows with that permutation of columns or I need to introduce a unique column to differential all rows from one another(probable number the rows 1, 2, 3...).
I'll look through my list tomorrow and remove repetitive rows(if any) and try the formula again. I'll update you two.
And thank you for the replies and explanations.

RandyHayes
Super User
Super User

@AD1990 

LookUp will return the very first occurrence of the record that matches your criteria.

If you want to double check things, you can always throw a label on your screen and set the Text property to:

LookUp('Tuition', Teacher_ID=Gallery9_1.Selected.Teacher_ID && 
       Student_ID=Gallery9_1.Selected.Student_ID && 
       (Lower(Tuition_Subject.Value) = Lower(Gallery9_1.Selected.Tuition_Subject.Value)),
       true
)

This will show true if it is found and false if not.

 

If it shows false any you feel is should be true, then I would start to pull that formula apart and hard-code in values.  i.e. change Gallery9_1.Selected.Teacher_ID to a known ID, etc.

 

See if that way you can narrow down to which part of the formula is causing you some grief.

_____________________________________________________________________________________
Digging it? - Click on the Thumbs Up below. Solved your problem? - Click on Accept as Solution below. Others seeking the same answers will be happy you did.
NOTE: My normal response times will be Mon to Fri from 1 PM to 10 PM UTC (and lots of other times too!)
Check out my PowerApps Videos too! And, follow me on Twitter @RandyHayes

Really want to show your appreciation? Buy Me A Cup Of Coffee!

@RandyHayes Hey, thank you for the response. I checked as you  suggested and the lookup is returning value. I'll do analysis on this later on. For now I have introduced a column with unique id for the patch function to work as I am on a tight deadline. I really appreciate the explanation in the responses most of all. Thanks.

Helpful resources

Announcements

Exclusive LIVE Community Event: Power Apps Copilot Coffee Chat with Copilot Studio Product Team

  It's time for the SECOND Power Apps Copilot Coffee Chat featuring the Copilot Studio product team, which will be held LIVE on April 3, 2024 at 9:30 AM Pacific Daylight Time (PDT).     This is an incredible opportunity to connect with members of the Copilot Studio product team and ask them anything about Copilot Studio. We'll share our special guests with you shortly--but we want to encourage to mark your calendars now because you will not want to miss the conversation.   This live event will give you the unique opportunity to learn more about Copilot Studio plans, where we’ll focus, and get insight into upcoming features. We’re looking forward to hearing from the community, so bring your questions!   TO GET ACCESS TO THIS EXCLUSIVE AMA: Kudo this post to reserve your spot! Reserve your spot now by kudoing this post.  Reservations will be prioritized on when your kudo for the post comes through, so don't wait! Click that "kudo button" today.   Invitations will be sent on April 2nd.Users posting Kudos after April 2nd. at 9AM PDT may not receive an invitation but will be able to view the session online after conclusion of the event. Give your "kudo" today and mark your calendars for April 3rd, 2024 at 9:30 AM PDT and join us for an engaging and informative session!

Tuesday Tip: Unlocking Community Achievements and Earning Badges

TUESDAY TIPS are our way of communicating helpful things we've learned or shared that have helped members of the Community. Whether you're just getting started or you're a seasoned pro, Tuesday Tips will help you know where to go, what to look for, and navigate your way through the ever-growing--and ever-changing--world of the Power Platform Community! We cover basics about the Community, provide a few "insider tips" to make your experience even better, and share best practices gleaned from our most active community members and Super Users.   With so many new Community members joining us each week, we'll also review a few of our "best practices" so you know just "how" the Community works, so make sure to watch the News & Announcements each week for the latest and greatest Tuesday Tips!     THIS WEEK'S TIP: Unlocking Achievements and Earning BadgesAcross the Communities, you'll see badges on users profile that recognize and reward their engagement and contributions. These badges each signify a different achievement--and all of those achievements are available to any Community member! If you're a seasoned pro or just getting started, you too can earn badges for the great work you do. Check out some details on Community badges below--and find out more in the detailed link at the end of the article!       A Diverse Range of Badges to Collect The badges you can earn in the Community cover a wide array of activities, including: Kudos Received: Acknowledges the number of times a user’s post has been appreciated with a “Kudo.”Kudos Given: Highlights the user’s generosity in recognizing others’ contributions.Topics Created: Tracks the number of discussions initiated by a user.Solutions Provided: Celebrates the instances where a user’s response is marked as the correct solution.Reply: Counts the number of times a user has engaged with community discussions.Blog Contributor: Honors those who contribute valuable content and are invited to write for the community blog.       A Community Evolving Together Badges are not only a great way to recognize outstanding contributions of our amazing Community members--they are also a way to continue fostering a collaborative and supportive environment. As you continue to share your knowledge and assist each other these badges serve as a visual representation of your valuable contributions.   Find out more about badges in these Community Support pages in each Community: All About Community Badges - Power Apps CommunityAll About Community Badges - Power Automate CommunityAll About Community Badges - Copilot Studio CommunityAll About Community Badges - Power Pages Community

Tuesday Tips: Powering Up Your Community Profile

TUESDAY TIPS are our way of communicating helpful things we've learned or shared that have helped members of the Community. Whether you're just getting started or you're a seasoned pro, Tuesday Tips will help you know where to go, what to look for, and navigate your way through the ever-growing--and ever-changing--world of the Power Platform Community! We cover basics about the Community, provide a few "insider tips" to make your experience even better, and share best practices gleaned from our most active community members and Super Users.   With so many new Community members joining us each week, we'll also review a few of our "best practices" so you know just "how" the Community works, so make sure to watch the News & Announcements each week for the latest and greatest Tuesday Tips!   This Week's Tip: Power Up Your Profile!  🚀 It's where every Community member gets their start, and it's essential that you keep it updated! Your Community User Profile is how you're able to get messages, post solutions, ask questions--and as you rank up, it's where your badges will appear and how you'll be known when you start blogging in the Community Blog. 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.     Password Puzzles? No Problem! Find out how to sync your Azure AD password with your community account, ensuring a seamless sign-in. No separate passwords to remember! Job Jumps & Email Swaps Changed jobs? Got a new email? Fear not! You'll find out how to link your shiny new email to your existing community account, keeping your contributions and connections intact. Username Uncertainties Unraveled Picking the perfect username is crucial--and sometimes the original choice you signed up with doesn't fit as well as you may have thought. There's a quick way to request an update here--but remember, your username is your community identity, so choose wisely. "Need Admin Approval" Warning Window? If you see this error message while using the community, don't worry. A simple process will help you get where you need to go. If you still need assistance, find out how to contact your Community Support team. Whatever you're looking for, when it comes to your profile, the Community Account Support Knowledge Base article is your treasure trove of tips as you navigate the nuances of your Community Profile. It’s the ultimate resource for keeping your digital identity in tip-top shape while engaging with the Power Platform Community. So, dive in and power up your profile today!  💪🚀   Community Account Support | Power Apps Community Account Support | Power AutomateCommunity Account Support | Copilot Studio  Community Account Support | Power Pages

Super User of the Month | Chris Piasecki

In our 2nd installment of this new ongoing feature in the Community, we're thrilled to announce that Chris Piasecki is our Super User of the Month for March 2024. If you've been in the Community for a while, we're sure you've seen a comment or marked one of Chris' helpful tips as a solution--he's been a Super User for SEVEN consecutive seasons!       Since authoring his first reply in April 2020 to his most recent achievement organizing the Canadian Power Platform Summit this month, Chris has helped countless Community members with his insights and expertise. In addition to being a Super User, Chris is also a User Group leader, Microsoft MVP, and a featured speaker at the Microsoft Power Platform Conference. His contributions to the new SUIT program, along with his joyous personality and willingness to jump in and help so many members has made Chris a fixture in the Power Platform Community.   When Chris isn't authoring solutions or organizing events, he's actively leading Piasecki Consulting, specializing in solution architecture, integration, DevOps, and more--helping clients discover how to strategize and implement Microsoft's technology platforms. We are grateful for Chris' insightful help in the Community and look forward to even more amazing milestones as he continues to assist so many with his great tips, solutions--always with a smile and a great sense of humor.You can find Chris in the Community and on LinkedIn. Thanks for being such a SUPER user, Chris! 💪🌠

Find Out What Makes Super Users So Super

We know many of you visit the Power Platform Communities to ask questions and receive answers. But do you know that many of our best answers and solutions come from Community members who are super active, helping anyone who needs a little help getting unstuck with Business Applications products? We call these dedicated Community members Super Users because they are the real heroes in the Community, willing to jump in whenever they can to help! Maybe you've encountered them yourself and they've solved some of your biggest questions. Have you ever wondered, "Why?"We interviewed several of our Super Users to understand what drives them to help in the Community--and discover the difference it has made in their lives as well! Take a look in our gallery today: What Motivates a Super User? - Power Platform Community (microsoft.com)

March User Group Update: New Groups and Upcoming Events!

  Welcome to this month’s celebration of our Community User Groups and exciting User Group events. We’re thrilled to introduce some brand-new user groups that have recently joined our vibrant community. Plus, we’ve got a lineup of engaging events you won’t want to miss. Let’s jump right in: New User Groups   Sacramento Power Platform GroupANZ Power Platform COE User GroupPower Platform MongoliaPower Platform User Group OmanPower Platform User Group Delta StateMid Michigan Power Platform Upcoming Events  DUG4MFG - Quarterly Meetup - Microsoft Demand PlanningDate: 19 Mar 2024 | 10:30 AM to 12:30 PM Central America Standard TimeDescription: Dive into the world of manufacturing with a focus on Demand Planning. Learn from industry experts and share your insights. Dynamics User Group HoustonDate: 07 Mar 2024 | 11:00 AM to 01:00 PM Central America Standard TimeDescription: Houston, get ready for an immersive session on Dynamics 365 and the Power Platform. Connect with fellow professionals and expand your knowledge. Reading Dynamics 365 & Power Platform User Group (Q1)Date: 05 Mar 2024 | 06:00 PM to 09:00 PM GMT Standard TimeDescription: Join our virtual meetup for insightful discussions, demos, and community updates. Let’s kick off Q1 with a bang! Leaders, Create Your Events!    Leaders of existing User Groups, don’t forget to create your events within the Community platform. By doing so, you’ll enable us to share them in future posts and newsletters. Let’s spread the word and make these gatherings even more impactful! Stay tuned for more updates, inspiring stories, and collaborative opportunities from and for our Community User Groups.   P.S. Have an event or success story to share? Reach out to us – we’d love to feature you!

Top Solution Authors
Top Kudoed Authors
Users online (5,000)