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Created: |
Updated: |
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| 149842 | Dec 11,2019 12:25 PM UTC | Apr 10,2020 11:49 AM UTC | Angular - EJ 2 | 9 |
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Tags: Grid |
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import { Query, DataManager, UrlAdaptor } from "@syncfusion/ej2-data";
/**
* GraphQL Adaptor with Essentail JS2 Grid
*/
export class CustomGraphQLAdaptor extends UrlAdaptor {
public opt: IGraphQLAdaptorOptions;
public schema: { result: string, count: string };
public query: string;
public getVariables: Function;
public getQuery: Function;
constructor(options: IGraphQLAdaptorOptions) {
super();
this.opt = options;
this.schema = this.opt.response;
this.query = this.opt.query;
// tslint:disable-next-line:no-empty
this.getVariables = () => { };
this.getQuery = () => this.query;
}
processQuery(datamanager: DataManager, query: Query) {
var result = super.processQuery.apply(this, arguments);
var tmp = JSON.parse(result.data);
var vars = this.getVariables() || {};
vars['datamanager'] = tmp;
var data = JSON.stringify({
query: this.getQuery(),
variables: vars
});
result.data = data;
return result; // form query based on your need
}
processResponse(data: any, context: any, query: any) {
return data.data.orders; // should return result and count
}
generateData(inserted: { data: string }, action: string) {
let parsed = JSON.parse(inserted.data);
inserted.data = JSON.stringify({
query: this.opt.getMutation(action),
variables: parsed
});
return inserted;
}
}
let data: Object = new DataManager({
url: 'http://localhost:4000/graphql',
adaptor: new CustomGraphQLAdaptor({
response: {
result: 'orders',
count: 'count'
},
query: `query Order($datamanager: DataManager) { // initial loading
orders(datamanager: $datamanager) {
result { // column names are defined
CustomerID,
ShipName,
Freight
},
count
}
}`
})
});
. . . . .
export interface IGraphQLAdaptorOptions {
response: { result: string, count: string };
query: string;
getQuery?: () => string;
getVariables?: () => Object;
getMutation?: (action: string) => string;
}
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<ejs-grid #grid [dataSource]='data | async' allowPaging='true' [editSettings]='editSettings' allowGrouping='true'
allowReordering='true' (actionFailure)="actionComplete($event)" [toolbar]='toolbar' (dataStateChange)='dataStateChange($event)'>
<e-columns>
<e-column field='id' headerText='Customer ID' width='120' textAlign='Right' isPrimaryKey='true'></e-column>
<e-column field="name" headerText="City" foreignKeyField="name" foreignKeyValue="ShipCity" [dataSource]='colData'
width="150"></e-column>
</e-columns>
</ejs-grid>
public ngOnInit(): void {
. . . . .
this.crudService.execute(state);
const fData: Object[] = [
{ id: 1, name: 'HANAR', ShipCity: 'Germany' },
{ id: 2, name: 'VINER', ShipCity: 'Berlin' },
. . . . .
] // you can get the foreign key data and assign to data manager
this.colData = new DataManager({
json: fData
});
}
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<ejs-grid #Grid [dataSource]='data | async' allowPaging= 'true' [pageSettings]='pageOptions' allowSorting= 'true' allowGrouping= 'true' (dataStateChange)= 'dataStateChange($event)' (actionFailure)='fail($event)'>
<e-columns>
. . . . .
<e-column field= "ShipCity" headerText="Ship City" width="150" foreignKeyField="ShipCity" foreignKeyValue="OrderID" [dataSource]='colData'></e-column>
</e-columns>
</ejs-grid>
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export class AsyncPipeComponent {
. . . . .
public dataStateChange(state: DataStateChangeEventArgs): void {
this.service.execute(state);
}
public colData: any;
public ngOnInit(): void {
. . . . .
this.service.subscribe((args)=>{
// you can directly assign json result to colData or assign to data manager
this.colData = new DataManager({json: (args as any).result});
});
}
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class CustomGraphQLAdaptor extends UrlAdaptor {
processResponse(): Object {
let original: Object[] = super.processResponse.apply(this, arguments);
return original;
}
}
export class AppComponent {
public eventSettings: EventSettingsModel = {
dataSource: new DataManager({
url: 'http://localhost:54738/Home/LoadData', // Here need to mention the web api sample running path
crudUrl: 'http://localhost:54738/Home/UpdateData',
crossDomain: true,
adaptor: new CustomGraphQLAdaptor
}),
};
} |
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