Angular 2 - 错误:超出最大调用堆栈大小

时间:2017-05-15 13:02:24

标签: javascript angular

请看一下这个问题。

假设

我有一个带有表单的组件来添加/编辑测试用例。组件可以在3种不同的模式下运行(第一个参数)(0 - 空形式,1 - 编辑模式,2 - 显示模式(无输入),选择的测试用例作为第二个参数。第二个参数可以是一个测试用例对象(如果mode为0且定义了测试用例对象,则该对象将是新测试用例的父对象。如果mode为1,则选择测试用例将编辑测试用例,并且当mode为2时选择测试用例将显示测试用例。如果测试用例对象未定义,则新测试用例将不具有父对象,因此它将位于树的顶部。)

表单包含2个字段:name和feature-flag。可以从下拉列表中选择功能标志并添加到表单。它有一个树形结构。

错误再现

当我选择一个测试用例时,打开表单添加新的或编辑测试用例,添加一些标志,关闭表单,打开新表单,反复N次,它会出现错误。我的代码中没有任何recuret函数调用

错误文字:

enter image description here

代码

测试case.component.ts:

    /**
     * 
     */
    public ngOnInit() { 
        this.testCasesService.getAll().subscribe(
            records => {
                this.testCases = this.testCasesService.asTree(records, { parent: true, expanded: true })               
            },
            err => {
                console.log(err)
            }
        )
    } 

    /**
     * Opens test case form
     */
    private openTestCaseForm(parent, mode?) {
        if(!parent) 
            this.selectedNode = undefined; 

        if(this.mode != mode) 
            this.mode = mode;

        this.addNewTestCaseForm       = true  
    }

测试case.template.html

<div style="float: left; width: 100%;">
    <p>
        <p-toolbar>
            <div class="ui-toolbar-group-left">
                <button (click)="openTestCaseForm(false)" pButton type="button" label="New Test Case" icon="fa-plus"></button>
                <button *ngIf="!selectedNode" [disabled]="true" pButton type="button" label="New Child Test Case" icon="fa-plus"></button>
                <button *ngIf="selectedNode" (click)="openTestCaseForm(true)" pButton type="button" label="New Child Test Case" icon="fa-plus"></button>
            </div> 
            <div class="ui-toolbar-group-right">
                <button *ngIf="selectedNode" (click)="openTestCaseForm(true, 1)" pButton type="button" icon="fa-pencil-square-o" label="Edit"></button>
                <button *ngIf="selectedNode" pButton type="button" icon="fa-trash-o" class="ui-button-danger" label="Remove"></button>
            </div>
        </p-toolbar> 
    </p>
</div>
<div style="float: left; width: 35%">
    Search <input placeholder="Search" pInputText type="text" style="border: 1px solid silver" /><br /><br />

    <p-tree [style]="{'font-size':'18px', 'width': '95%'}" selectionMode="single" [(selection)]="selectedNode" [value]="testCases"></p-tree>
</div>
<div style="float: left; width: 65%; border-left: 1px solid silver; padding-left: 20px; font-size: 18px">
    <test-case-editor [testCase]="selectedNode" *ngIf="selectedNode"></test-case-editor>           
</div>

<p-dialog width="1800" modal="true" header="Add New Test Case" [(visible)]="addNewTestCaseForm">
    <test-case-editor [testCase]="selectedNode" [mode]="mode"></test-case-editor>
</p-dialog>

test-case-editor.ts(测试用例表单控制器)

export class TestCaseEditorComponent implements OnInit {
    /**
     * Options for FEATURES flags 
     */
    private featureOptions:any[] = [];

    /**
     * Selected node
     */
    private selectedFeatureNode:any;

    /**
     * Added features (flags)
     */
    private nodes:any[] = [];

    /**
     * Name of test case
     */
    private name:string;

    /**
     * Test case to display/edit
     */
    @Input() public testCase:any;

    /**
     * Mode (0 - new tc, 1 - edit mode, 2 - display mode)
     */
    @Input() public mode:number = 2;

    /**
     * Constructor
     * @param featureFlagsService 
     * @param testCasesService 
     * @param communicatesService 
     */
    constructor(
        private testCasesService:TestCasesService,
        private communicatesService:CommunicatesService,
        private featureFlagsService:FeatureFlagsService) {}

    /**
     * Actions after init
     */
    public ngOnInit() {

    }

    public ngOnChanges() {
        this.init()
    }


    /**
     * Loads flags for particular testCase
     * @param testCase
     */
    public init() {
        this.nodes = []

        this.featureFlagsService.getAll().subscribe(           
            records => {   
                //Creating a tree        
                let tree = this.featureFlagsService.asTree(records, { parent: true })      

                let features      = this.testCasesService.getFeatures(tree)
                let configuration = this.testCasesService.getConfigurationFeatures(tree)

                let featureOptions     = [{ label: 'Select feature...', value: null }]
                featureOptions         = featureOptions.concat(this.testCasesService.getFeaturesOptions(configuration))
                this.featureOptions    = featureOptions.concat(this.testCasesService.getFeaturesOptions(features))

                //Filling form with flags in table when editing
                if(this.testCase && (this.mode == 1 || this.mode == 2)) {
                    this.name = this.testCase.data.name;


                }   
            }                                             
        )          
    }

    /**
     * Adds flag to feature list
     * @param flag 
     */
    private addNode(node) {  
        let found = this.nodes.find(element => {
            if(element.data.id == node.data.id) {
                return true
            }
        })
        if(!found) 
            this.nodes.push(node)
    }

此致

1 个答案:

答案 0 :(得分:0)

为什么你是香蕉拳击非ngModels?

[(visible)]="addNewTestCaseForm"

这应该是单向绑定:

[visible]="addNewTestCaseForm"

看起来某些语法问题可能会妨碍你。