[ODATA-1116] Introduce $this for referencing current item in $select/$expand options - OASIS Technical Committees Issue Tracker

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: V4.01_CSD02
Fix Version/s: V4.01_CSD03
Component/s: ABNF, URL Conventions
Labels:
None
Environment:

[Proposed]

Proposal:

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add $this to specify the property (or navigation property) on which the select (or expand) option is specified.

This supports patterns like:
Me?$select=PhoneNumbers($filter=StartsWith($this,"425"))
Me?$expand=Friends($filter=ns.IsAGoodGuy($this))
Me?$expand=Friends(@a=$this;$expand=Friends($filter=Friends/Any(f:f/Friends eq @a)))

The last one would (I think) return all of my friends, and all of their friends that have them as a friend.

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add $this to specify the property (or navigation property) on which the select (or expand) option is specified. This supports patterns like: Me?$select=PhoneNumbers($filter=StartsWith($this,"425")) Me?$expand=Friends($filter=ns.IsAGoodGuy($this)) Me?$expand=Friends(@a=$this;$expand=Friends($filter=Friends/Any(f:f/Friends eq @a))) The last one would (I think) return all of my friends, and all of their friends that have them as a friend.
Resolution:

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https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-construction-rules.txt?op=diff&rev=1092
https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-testcases.xml?op=diff&rev=1092

https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-construction-rules.txt?op=diff&rev=1093
https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-testcases.xml?op=diff&rev=1093

http://docs.oasis-open.org/odata/odata/v4.01/csprd03/part2-url-conventions/odata-v4.01-csprd03-part2-url-conventions.html#sec_this

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https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-construction-rules.txt?op=diff&rev=1092 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-testcases.xml?op=diff&rev=1092 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-construction-rules.txt?op=diff&rev=1093 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-testcases.xml?op=diff&rev=1093 http://docs.oasis-open.org/odata/odata/v4.01/csprd03/part2-url-conventions/odata-v4.01-csprd03-part2-url-conventions.html#sec_this

Description

In OData-1105 we introduced $select options which enabled filtering a collection of structural properties. Where the collection is a collection of complex types, you can now do something like:

Customers?$select=Addresses($filter=City eq 'Paris')

However, we don't have a way to filter primitive types.

We also don't have a way, in $select or $expand, to pass the current item into a function without binding the function to the type of the current item.

We already have $it that references the resource identified by the last segment of the resource path, but in this case we want to reference the property on which the select/expand options are specified.

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Assignee:

Unassigned

Reporter:

Michael Pizzo

Watchers:

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Dates

Created:

27/Sep/17 4:38 PM

Updated:

06/Nov/17 1:11 PM

Resolved:

28/Sep/17 3:18 PM