Comments (6)
I honestly don't know. I tried it in a fiddle based on the demo and it just works fine: https://jsfiddle.net/posva/r3ab21nm/
Maybe you can try fiddling around to see where the issue is coming from. If you find a bug, please tell me here or better off, open a new issue with the repro
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I think I was able to reproduce it with simpler code.
HTML
`
<ul>
<li v-for="team in teams">{{ team.name }}</li>
</ul>
<pre>
{{ firstPlaceTeam.name }}
</pre>
</div>`
JS
` var teamsRef = db.ref('teams');
var app = new Vue({
el: '#app',
data : function(){ return { news: [] }},
firebase : {
teams : teamsRef.limitToLast(7)
},
computed: {
firstPlaceTeam : function(){
return this.teams[0];
}
}
});`
I'm not getting undefined like I originally was, I'm wondering if its all tied together somehow.
When I run it the name prints out but I get errors.
Error when rendering root instance:
Uncaught TypeError: Cannot read property 'name' of undefined
Since the errors happen it breaks the js and it stops working. I'm wondering if that is what is going on.
In your js fiddle example I did changed it to print filtered.text and the error console showed the same error.
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That's because of {{ firstPlaceTeam.name }}
you need to check firstPlaceTeam first as it may be undefined: {{ firstPlaceTeam && firstPlaceTeam.name }}
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Thanks you.
Ill try my program tonight see if that's the culprit.
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@thedangler hi.. i think that is because the computed property is depending on the array populated by firebase. it looks like the computation is running too soon, before the firebase could finish fetching data.
@posva is it possible to include a optional doneCallback()
callback, similar to cancelCallback
? This doneCallback
could be called after the async operations of firebase are completed and the properties in the vm are updated. This will be very useful to avoid issues like the above mentioned one. Also, it can be used to show status to user while loading the data from remote firebase server.
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hi.. i think that is because the computed property is depending on the array populated by firebase. it looks like the computation is running too soon, before the firebase could finish fetching data.
The array is synchronously initialised to an empty array
About the doneCallback, I want to add something similar but not the for the same reasons.
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