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Errors trying to update Purchase Order via OData

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Posted on by WestonFire22

Hoping someone can give me a pointer on this.

Using Business Central Dynamics (hosted by MS), trying to update a Purchase Order custom field via a PUT or PATCH call with OData.

The field I am trying to update is a custom field we have added to the Purchase Order. I have created the OData server page for the Purchase Order page and the field is present in the results if I do a GET on the page.

The url I am calling is:

api.businesscentral.dynamics.com/.../<tenanat id>/<environment>/ODataV4/Company('<company name>')/PurchaseOrderPage?$filter=No eq '10201'

The json I am passing in is:

{ "Date_Sent_to_Vendor": 2023-05-01}

I have added the following headers to the call:

Content-Type : application/json

If-Match : W/"JzIwOzEzMjk3OTM3ODUwODE3MzIxMzM4MTswMDsn"

I do a GET right before the PATCH call to get the current eTag value to place in the If-Match header.

I am getting the dreaded:

'PATCH' requests for 'PurchaseOrderPage' of EdmType 'Collection' are not allowed within Dynamics 365 Business Central OData web services.

I have read all the other threads about making sure the If-Match is there with the current eTag but I am not able to get past this. All the other examples I have seen are for updating standard fields but nothing on updating a custom field.

Any help or advice would be greatly appreciated!

Thanks!

Bruce

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YUN ZHU 95,546 Super User 2025 Season 2 on at

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Hi, Similar to the following question.

But please note that if you publish a standard Purchase Order list, it cannot be edited, and the following error may appear.

If you insist on using Odata, I suggest you create a new page.

Below is a simple example of a Sales Order.

page 50011 "ZY Sales Orders" { ApplicationArea = All; Caption = 'ZY Sales Orders'; PageType = List; SourceTable = "Sales Header"; UsageCategory = Lists; layout { area(content) { repeater(General) { field("Document Type"; Rec."Document Type") { ToolTip = 'Specifies the value of the Document Type field.'; } field("No."; Rec."No.") { ToolTip = 'Specifies the number of the estimate.'; } field("Sell-to Customer No."; Rec."Sell-to Customer No.") { ToolTip = 'Specifies the number of the customer associated with the sales return.'; } field("Posting Date"; Rec."Posting Date") { ToolTip = 'Specifies the date when the sales document was posted.'; } field("Ship-to Code"; Rec."Ship-to Code") { ToolTip = 'Specifies the code for another shipment address than the customer''s own address, which is entered by default.'; } } } } }

api.businesscentral.dynamics.com/.../ZYNewSalesOrders(Document_Type='Order',No='101001')

Hope this can give you some hints.

Thanks.

ZHU

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Saurav.Dhyani 14,380 Super User 2025 Season 2 on at

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Hope this helps

[View:https://youtu.be/TSQiE42tDwU:320:240]

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