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Asalk
Frequent Visitor

How do I convert dynamic source with paginated REST API that uses offset to a static source?

I found an article that helped me paginate the REST API, however i'm not sure how to use Web.Content() to make the source static while using offset. 

This is the code i'm using :

 

let
    EntitiesPerPage = 500,
    Url = "https://OurOracleCloudLink.com/hcmRestApi",
    GetJson = (Url) =>
        let 			
            RawData = Web.Contents(Url,[RelativePath="/resources/11.13.18.05/workers",Query =[limit="500",totalResults="true"]]),
            Json    = Json.Document(RawData)
        in  Json,
    GetEntityCount = () =>
        let Url   = Url,
            Json  = GetJson(Url),
			Count = Json[#"totalResults"]
        in  
			Count,
    GetPage = (Index) =>
        let 
			offset  = "&offset=" & Text.From(Index * EntitiesPerPage), 
            Url   = Web.Contents(Url,[RelativePath="/resources/11.13.18.05/workers",Query =[limit="500",totalResults="true",offset=Number.From(Index * EntitiesPerPage)]]),
            Json  = GetJson(Url),
            Value = Json[#"items"]
        in  
			Value,

    EntityCount =  GetEntityCount(),
    PageCount   = Number.RoundUp(EntityCount / EntitiesPerPage),
    PageIndices = { 0 .. PageCount - 1 },
    Pages       = List.Transform(PageIndices, each GetPage(_)),
    Entities    = List.Union(Pages),
    Table       = Table.FromList(Entities, Splitter.SplitByNothing(), null, null, ExtraValues.Error)

in 

Table

 


I tried so many different ways, but it always tells me to convert the Offset value to binary or text, but whenever I do that, it tells me that it wants the value in a different type.

Thanks in advance.

2 REPLIES 2
amitchandak
Super User
Super User

@Asalk , Have you already checked these

https://blog.crossjoin.co.uk/2016/08/23/web-contents-m-functions-and-dataset-refresh-errors-in-power...

 

https://medium.com/@marktiedemann/how-to-do-pagination-in-power-query-430460c17c78

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Hey @amitchandak ,

I checked the two articles you mentioned, unfortunately I have already checked these before. My main problem is with offset

    GetPage = (Index) =>
        let 
			offset  = "&offset=" & Text.From(Index * EntitiesPerPage), 
            Url   = Web.Contents(Url,[RelativePath="/resources/11.13.18.05/workers",Query =[limit="500",totalResults="true",offset=Number.From(Index * EntitiesPerPage)]]),
            Json  = GetJson(Url),
            Value = Json[#"items"]
        in  
			Value,



i'm trying to wrap my head around it. this is my first time using REST API as we just have moved to Oracle Cloud, and it seems this is the only way to connect Power BI to SaaS.

Thanks.


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