Filter expanded OData request

问题

I need to pass a parameter to the backend. I want to use $filter for this. My code below is not working, there are no filters returned by io_tech_request_context->get_filter( )->get_filter_select_options( ) in the Figures entityset.

var aFilters = [ new sap.ui.model.Filter("TeamMembers/Figures/FILTERKEY", sap.ui.model.FilterOperator.EQ,   sFilterValue) ];

this.getView().bindElement({
    path: "/TeamDataSet('0')",
    parameters: {
     expand: 'TeamMembers/Figures'
    },
    filters: aFilters
});

回答1:

Element binding / ContextBinding doesn't support the property filters since you're binding just a single entity and not a collection. If you need to filter Figures, you'll have to bind them to an aggregation (e.g. items on List), get the corresponding ListBinding object, and then call .filter from there.

Here is a similar example: https://embed.plnkr.co/AoIZI4/. Take a look at the handler onSearch.

In case someone actually wants to filter a list by expanded results, the navigation property can be applied in the Filter path which then gets resolved by the path of the bound binding object. For example:

<List items="{
  path: 'myODataModel>/Products',
  parameters: {
    expand: 'ToSupplier'
  }
}">

Then in Controller, filter Products by their supplier country:

new Filter({
  path: "ToSupplier/Country",
  operator: "EQ",
  value1: "UK",
})

(From: https://embed.plnkr.co/wAlrHB/).

Be aware that this works only if expanding does not result in a collection but a single object (e.g. associated supplier). Filtering by looking up at an associated collection is supported as of OData V4 which can be achieved via FilterOperator.All / .Any.

来源：https://stackoverflow.com/questions/48115183/filter-expanded-odata-request

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