问题
Is there any way I can get only count of the data in response payload without any value array?
I am using ODataV4.0 with Webapi 2.2.
Currently it returns all the values and count when I query something like:
http://odata/People?$count=true
I just need something like "@odata.count":1, "value":[] or without "value".
Is the only way to have function for this job?
回答1:
Set the $top to zero and $count to true.
For example: http://services.odata.org/V4/Northwind/Northwind.svc/Customers?$count=true&$top=0
returns the count but no results
{"@odata.context":"http://services.odata.org/V4/Northwind/Northwind.svc/$metadata#Customers","@odata.count":91,"value":[]}
Count is calculated after applying the $filter, but without factoring in $top and $skip.
For example: http://services.odata.org/V4/Northwind/Northwind.svc/Customers?$count=true&$top=0&$filter=Country%20eq%20%27Germany%27
informs you that there are 11 results where the Country is 'Germany', but without returning any records in the response.
回答2:
You can also append $count as a path element to just get a raw count, E.G.,
https://services.odata.org/V4/Northwind/Northwind.svc/Customers/$count
This will also work with filters, etc, applied: https://services.odata.org/V4/Northwind/Northwind.svc/Customers/$count?$filter=Country%20eq%20%27Germany%27
For a count of Customers in Germany.
来源：https://stackoverflow.com/questions/30123094/how-to-get-only-odata-count-without-value