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Subject: [OASIS Issue Tracker] (ODATA-1026) Clarify when $it is required
[ https://issues.oasis-open.org/browse/ODATA-1026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=64933#comment-64933 ] Michael Pizzo commented on ODATA-1026: -------------------------------------- $it allows referencing the resource identified by the resource path. unqualified property references reference the current "scope". These may be the same thing in a simple request, but are not the same within a $expand (where an unqualified property reference references a property on the expanded nav prop). So in: http://host/service/Customers?$expand=Orders($filter=$it/Address/City eq ShipTo/City) Address would refer to a property on a Customer and ShipTo would refer to a property on an Order. $it is also used: -when referencing the resource itself (not a property of the resource), and -when invoking a function or action bound to the resource (to distinguish from an unbound action or function) > Clarify when $it is required > ---------------------------- > > Key: ODATA-1026 > URL: https://issues.oasis-open.org/browse/ODATA-1026 > Project: OASIS Open Data Protocol (OData) TC > Issue Type: Improvement > Components: OData URL Conventions > Affects Versions: V4.0_OS > Reporter: Matthew Borges > Priority: Minor > Fix For: V4.01_CSD02, V4.0_ERRATA04 > > > The description of $it says it CAN be used in a number of cases (see section 5.1.11.4 in the URL conventions document) but it isn't specific about when $it MUST be used. We should clarify when $it is required. For example, my understanding is that both of these queries are equivalent (in which case the $it is not required): > http://host/service/Customers?$filter=Orders/any(d:d/Quantity ge Age) > vs. > http://host/service/Customers?$filter=Orders/any(d:d/Quantity ge $it/Age) > However, my understanding is that in the case below the $it is required: > http://host/service/Customers?$expand=Orders($filter=$it/Address/City eq ShipTo/City) -- This message was sent by Atlassian JIRA (v6.2.2#6258)
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