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Sharepoint 2013 REST API limitations with site columns

Recently i attended an interview for one of the company, the interviewer asked me a question on rest api. How to get a publishing image field using rest api? I answered its the normal way how we get the other fields. But later i came to know that its the wrong answer. After some research on Google came to know that there some limitations to rest api in sharepoint 2013. Below is a list of columns available using Rest api.

ColumnSupportNotes
Hyperlink or PictureSupported
Single Line of TextSupported
Multiple lines of text :: PlaintextSupported
Multiple lines of text :: RichtextSupportedReturns unencoded XHTML
Multiple lines of text :: Enhanced RichtextSupportedReturns unencoded XHTML
ChoiceSupportedColumn is required in the $expand keyword
CounterSupported
IntegerSupported
NumberSupported
CurrencySupported
DateSupportedReturns an ISO 8601 date e.g. 2013-03-08T11:00:00
Yes/NoSupportedReturns true or false string literals
Person or GroupSupportedColumn is required in the $expand keyword, append “Id” to the column name to get the user id (UserInformationList) value inline with each entry
Person or Group (Multi)SupportedColumn is required in the $expand keyword
CalculatedSupported
ComputedSupported
Managed MetadataNot Supported
Managed Metadata (Multi)Not Supported
Publishing HTMLNot Supported
Publishing HyperlinkNot Supported
Publishing ImageNot Supported
Media FieldNot Supported
Summary LinksNot Supported
Publishing ImageNot Supported
LookupSupportedColumn is required in the $expand keyword, append “Id” to the column name to get the lookup column target id value inline with each entry
Lookup (Multi)SupportedColumn is required in the $expand keyword
As far as getting the publishing image field we need to make two requests. First get the item using the below query

Request1 url: http://wingtip.com/_api/web/lists/getbytitle('contacts')/items

In the second request we need to add fieldvalueashtml to url.

Request2 url: http://wingtip.com/_api/web/lists/getbytitle('contacts')/items(1)/fieldvalueashtml


Reference: http://stackoverflow.com/questions/25852997/retrieve-publishing-image-field-with-sharepoint-2013-rest-api-csom

 http://www.ashokraja.me/post/Querying-and-exploring-REST-API-with-oData-in-SharePoint-2013-with-DataBase-net.aspx

Hope its helpful.

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