聚合物阵列推送出错

Question

I've used this.push in Polymer but now I got error and I can't find what it is due to. Here's my code:

 if (!ui.validation.validateForm(this.$.partnerForm)) return; var partner = { name: this.$.partnerName.value, description: this.$.partnerDescription.value }; if (!this.eventData.partners) this.eventData.partners = []; this.push('eventData.partners', partner);

The error is:

 Uncaught TypeError: Cannot read property 'length' of undefined at HTMLTemplateElement._applySplicesArrayOrder (polymer.html:4991) at HTMLTemplateElement._render (polymer.html:4842) at Debouncer.complete (polymer-mini.html:2081) at Debouncer.boundComplete (polymer-mini.html:2058) at Object._atEndOfMicrotask (polymer-mini.html:2036) at MutationObserver.window.MutationObserver.observe.characterData

When I debug using console.log(this.eventData.partners) data is there, but after that it gives that error. What might be wrong with this push? Thanks.

Answer 1

I found the problem. I have been used this:

if (!this.eventData.partners) this.eventData.partners = [];

I changed it in the following way and it's working now:

if (!this.eventData.partners) this.set('eventData.partners', []);

This is Polymer specific issue.