DevExtreme jQuery - ODataContext Methods
This section describes the methods that control the ODataContext.
get(operationName, params)
Invokes an OData operation that returns a value.
A Promise that is resolved after the operation has completed. It is a native Promise or a jQuery.Promise when you use jQuery.
jQuery
JavaScript
var context = new DevExpress.data.ODataContext({
// ODataContext is configured here
});
var products = context.get("GetProductsByRating", { rating: 3 });Angular
TypeScript
import ODataContext from "devextreme/data/odata/context";
// ...
export class AppComponent {
context: ODataContext;
constructor() {
this.context = new ODataContext({
// ODataContext is configured here
});
let products = this.context.get("GetProductsByRating", { rating: 3 });
}
}See Also
invoke(operationName, params, httpMethod)
Invokes an OData operation that returns nothing.
Parameters:
A Promise that is resolved after the operation has completed. It is a native Promise or a jQuery.Promise when you use jQuery.
jQuery
JavaScript
var context = new DevExpress.data.ODataContext({
// ODataContext is configured here
});
context.invoke("Add", { fieldName: "fieldValue" }, "POST");Angular
TypeScript
import ODataContext from "devextreme/data/odata/context";
// ...
export class AppComponent {
context: ODataContext;
constructor() {
this.context = new ODataContext({
// ODataContext is configured here
});
this.context.invoke("Add", { fieldName: "fieldValue" }, "POST");
}
}See Also
objectLink(entityAlias, key)
Gets a link to an entity with a specific key.
Parameters:
Return Value:
An object that contains the link to the entity.
Call this method within the insert() or the update() method to change the relationships between entities. The following code links the order with ID 1 to the customer with ID 2:
jQuery
JavaScript
var context = new DevExpress.data.ODataContext({
url: "https://js.devexpress.com/Demos/DevAV/odata/",
entities: {
Orders: {
key: "Order_ID",
keyType: "Int32"
},
Customers: {
key: "Customer_ID",
keyType: "Int32"
}
}
});
context.Orders.update(1, {
Customer: context.objectLink("Customers", 2)
});Angular
TypeScript
import ODataContext from "devextreme/data/odata/context";
// ...
export class AppComponent {
context: ODataContext;
constructor() {
this.context = new ODataContext({
url: "https://js.devexpress.com/Demos/DevAV/odata/",
entities: {
Orders: {
key: "Order_ID",
keyType: "Int32"
},
Customers: {
key: "Customer_ID",
keyType: "Int32"
}
}
});
this.context.Orders.update(1, {
Customer: context.objectLink("Customers", 2)
});
}
}See Also
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