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otravers
Community Champion
Community Champion

Can query parameters be applied to functions?

I have a function that retrieves data from a web API. One of the fields to be passed to the API accepts just two values, "10-Q" and "10-K". I've read the blog posts about parameters and created a parameter list with these two values, but is there a way to use that parameter right in the function definition (i.e. not in a downstream query)? This would work as a form of data validation when the function is invoked.

 

Screenshot below to try and clarify what I mean:

 

 

function-parameter.png 

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1 ACCEPTED SOLUTION

Hi @otravers

 

I think that you can put your variable as part of your function in your code below.

 

let
    Source = (ticker as text, FormTypes as text, order as text) as table =>
let
    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & #"ticker" & "/balancesheet?formType=" & #"FormTypes" & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),
    #"Converted to Table" = Record.ToTable(Source),
    #"Transposed Table" = Table.Transpose(#"Converted to Table"),
    #"Promoted Headers" = Table.PromoteHeaders(#"Transposed Table")
in
    #"Promoted Headers"
in
    Source

What I have done is to change it from your parameters in your Source line which might work?

 

    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & #"ticker" & "/balancesheet?formType=" & #"FormTypes" & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),

 





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View solution in original post

6 REPLIES 6
Anonymous
Not applicable

Hi otravers

 

Try this code:

= (ticker as text) as table =>
let
FormTypes = "10-Q",
order = "10-K", 

    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & ticker & "/balancesheet?formType=" & FormTypes & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),
    #"Converted to Table" = Record.ToTable(Source),
    #"Transposed Table" = Table.Transpose(#"Converted to Table"),
    #"Promoted Headers" = Table.PromoteHeaders(#"Transposed Table")
in
    #"Promoted Headers"

I couldn't test it properly, as I don't have permission for this site.

 

Hp Pfister, order is a separate variable. What you're doing just hardcodes "10-Q" as the value for FormTypes, while what I'm looking for is a way to restrict input for FormTypes to its two valid values, 10-Q and 10-K.

 

smoupre, thanks but it looks too complicated for my purposes. I'll live with M's limitations 🙂

------------------------------------------------
1. How to get your question answered quickly - good questions get good answers!
2. Learning how to fish > being spoon-fed without active thinking.
3. Please accept as a solution posts that resolve your questions.
------------------------------------------------
BI Blog: Datamarts | RLS/OLS | Dev Tools | Languages | Aggregations | XMLA/APIs | Field Parameters | Custom Visuals
Greg_Deckler
Community Champion
Community Champion

I do not believe that is a proper use case for parameters. I think you would be better off just coding it into your fucntion, something like:

 

values = {"10-Q", "10-K"}

And then just validating against that list.

 

For more on parameter use cases, I would refere to this excellent series of blog posts:

http://biinsight.com/power-bi-desktop-query-parameters-part-1/



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OK, I did some more reading on function syntax but didn't find how to "just code" the acceptable values into the function using an array as you suggested. May I ask where you'd put it in the following code?

 

let
    Source = (ticker as text, FormTypes as text, order as text) as table =>
let
    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & ticker & "/balancesheet?formType=" & FormTypes & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),
    #"Converted to Table" = Record.ToTable(Source),
    #"Transposed Table" = Table.Transpose(#"Converted to Table"),
    #"Promoted Headers" = Table.PromoteHeaders(#"Transposed Table")
in
    #"Promoted Headers"
in
    Source
------------------------------------------------
1. How to get your question answered quickly - good questions get good answers!
2. Learning how to fish > being spoon-fed without active thinking.
3. Please accept as a solution posts that resolve your questions.
------------------------------------------------
BI Blog: Datamarts | RLS/OLS | Dev Tools | Languages | Aggregations | XMLA/APIs | Field Parameters | Custom Visuals

Hi @otravers

 

I think that you can put your variable as part of your function in your code below.

 

let
    Source = (ticker as text, FormTypes as text, order as text) as table =>
let
    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & #"ticker" & "/balancesheet?formType=" & #"FormTypes" & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),
    #"Converted to Table" = Record.ToTable(Source),
    #"Transposed Table" = Table.Transpose(#"Converted to Table"),
    #"Promoted Headers" = Table.PromoteHeaders(#"Transposed Table")
in
    #"Promoted Headers"
in
    Source

What I have done is to change it from your parameters in your Source line which might work?

 

    Source = Json.Document(Web.Contents("https://services.last10k.com/v1/company/" & #"ticker" & "/balancesheet?formType=" & #"FormTypes" & "&filingOrder=" & order, [Headers=[#"Ocp-Apim-Subscription-Key" = "redacted"]])),

 





Did I answer your question? Mark my post as a solution!

Proud to be a Super User!







Power BI Blog

Here is an example:

 

https://community.powerbi.com/t5/Community-Blog/Using-Recursion-to-Solve-Hex-to-Decimal-Conversion/b...

 



Follow on LinkedIn
@ me in replies or I'll lose your thread!!!
Instead of a Kudo, please vote for this idea
Become an expert!: Enterprise DNA
External Tools: MSHGQM
YouTube Channel!: Microsoft Hates Greg
Latest book!:
DAX For Humans

DAX is easy, CALCULATE makes DAX hard...

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