[英]Angular2 Sequential POST Calls
我有一組嘗試依次發送的POST,例如:
if (this.ifoForm.valid) {
if (this.otherCheck && (!this.selectedLang || !this.selectedInterp)) {
swal('Error!', 'Please choose Language and Interpreter!', 'error');
} else {
// create CallTracker entity
this.createCallLog();
// create CTClient entity
this.createCTClient();
// create CTTeln entity
this.createCTTelns();
// create CTClientOffence entities
this.createCTClientOffences();
}
}
事實是,與CTClient
,無法使用CallTracker
(呼叫日志)實體創建CTTelns
。 除了CTClientOffences
不能創建,直到CallTracker
和CTClient
實體存在。
我的容器組件中有實體對象,這些對象在POST返回時實例化:
private callLog: CallTracker;
private logClient: CTClient;
private logTelns: CTTeln[];
private logCharges: CTClientOffence[];
例如:
public onLogNotify(callLog): void {
// add new CallTracker entity to database
this._callTrackerService.addLog(callLog)
.subscribe(
res => this.callLog = res,
err => console.log(err)
);
}
我的問題是:在實例化適當的對象之前,我可以使用這些對象來限制對后續POSTS的調用嗎? 即我可以代替.timeout()
使用什么:
public onClientNotify(client): void {
// add new CTClient entity to database
this._ctClientService.addCTClient(client)
.timeout(2000) // wait for CallTracker entity to be made
.subscribe(
res => this.logClient = res,
err => console.log(err)
);
}
我使用以下模式弄清楚了: Angular2-多個依賴的順序http api調用 。
演示組件:
if (this.ifoForm.valid) {
if (this.otherCheck && (!this.selectedLang || !this.selectedInterp)) {
swal('Error!', 'Please choose Language and Interpreter!', 'error');
} else {
// perform POSTs
this.doPostCalls();
}
}
@Output() dataNotify: EventEmitter<any> = new EventEmitter<any>();
// CREATE (POST) DATABASE ENTITIES
private doPostCalls(): void {
// execute functions
this.createCallLog();
this.createCTClient();
this.createCTTelns();
this.createCTClientOffences();
// send data to parent component for http calls
this.dataNotify.emit({
callLog: this.newCallLog,
client: this.newLogClient,
telns: this.telnData,
charges: this.chargesData
});
}
容器組件:
public onDataNotify(data): void {
this.callLog = data.callLog;
this.logClient = data.client;
this.logTelns = data.telns;
this.logCharges = data.charges;
if (this.callLog != undefined) {
this.createCallTrackerEntity();
}
}
public createCallTrackerEntity(): void {
console.log("In: onLogNotify(data)");
// add new CallTracker entity to database
this._callTrackerService.addLog(this.callLog)
.subscribe(
res => console.log("CallTracker Data Added."),
err => console.log(err),
() => this.createCTClientEntity()
);
}
public createCTClientEntity(): void {
console.log("In: onClientNotify(client)");
// add new CTClient entity to database
this._ctClientService.addCTClient(this.logClient)
.subscribe(
res => console.log("CTClient Data Added."),
err => console.log(err),
() => this.createCTTelnEntities()
);
}
public createCTTelnEntities(): void {
console.log("In: onTelnNoify(telns)");
// add new CTTeln entity to database
this._ctTelnService.addCTTeln(this.logNumber, this.logTelns)
.subscribe(
res => console.log("CTTeln Data Added."),
err => console.log(err),
() => this.createCTClientOffenceEntities()
);
}
public createCTClientOffenceEntities(): void {
console.log("In: onOffenceNotify(offences)");
// add mew CTClientOffence entity to database
this._ctClientOffenceService.addCTClientOffence(this.logNumber, this.maxClientId, this.logCharges)
.subscribe(
res => console.log("CTClientOffence Data Added."),
err => console.log(err)
);
}
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