Table of Contents
What is EnableQuery?
The [EnableQuery] attribute is an action filter that parses, validates, and applies the query. The filter converts the query options into a LINQ expression. When the controller returns an System. Linq. IQueryable type, the IQueryable LINQ provider converts the LINQ expression into a query.
Which OData query option does Web API support?
Enabling OData Query Options
| Option | Description |
|---|---|
| $filter | Filters the results, based on a Boolean condition. |
| $inlinecount | Tells the server to include the total count of matching entities in the response. (Useful for server-side paging.) |
| $orderby | Sorts the results. |
| $select | Selects which properties to include in the response. |
What is the use of OData in Web API?
The Open Data Protocol (OData) is a data access protocol for the web. OData provides a uniform way to query and manipulate data sets through CRUD operations (create, read, update, and delete). ASP.NET Web API supports both v3 and v4 of the protocol.
Is REST and OData same?
REST stands for REpresentational State Transfer which is a resource based architectural style. Resource based means that data and functionalities are considered as resources. OData is a web based protocol that defines a set of best practices for building and consuming RESTful web services.
What is the difference between OData REST and SOAP?
OData services are lightweight, with functionality often referenced directly in the URI. Whereas SOAP web services expose a WSDL document, OData web services expose an EDMX document containing metadata for all published web services.
What is paging in OData SAP?
Paging is used for restricting data(instead of feeding ALL) from the backend to the frontend which helps to improve the performance by reducing the records in the response. Let’s take an example, suppose there is a UI5/Fiori application in which you need to display the list of sales orders.
What is $expand in SAP OData?
OData query option $expand is used to read multiple entities or entity sets in a single service call instead of two different calls. Prerequisite, entity sets which are used should be associated. To know about Association in OData service click here.
How does pagination work in OData?
In client-driven paging, we request the server to return the specified number of results. There is no nextLink that is returned. The OData Client deals with client-driven paging using $skip and $top query options. The $top query option requests the number of items in the queried collection to be included in the result.
When to use IQueryable in LINQ?
Show activity on this post. IQueryable is used when you are using Linq-to-entities = you are building declarative LINQ query in your application which will be interpreted by LINQ provider as SQL and executed on the server.
What does enablequerysupport do in Salesforce?
} The EnableQuerySupport method enables query options globally for any controller action that returns an IQueryable type. If you don’t want query options enabled for the entire application, you can enable them for specific controller actions by adding the [Queryable] attribute to the action method.
How do I enable query options for specific controller actions?
If you don’t want query options enabled for the entire application, you can enable them for specific controller actions by adding the [Queryable] attribute to the action method. This section shows the types of queries that are possible using the OData query options.
What is the difference between IEnumerable and IQueryable?
Difference between IEnumerable and IQueryable is not in the way how data are fetched because IQueryable is IEnumerable. The difference is in backing construct (something must implement these interfaces). Show activity on this post. Working on an IEnumerable means that all further operations will happen in C# code, i.e. linq-to-objects.