firebase - Push command creating error: Cannot read property 'replace' of undefined -

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i've seen variations of question in context of angularjs kendogrid backbonejs answers related frameworks , none of them address directly @ straight-up firebase level. since i'm not using of those, answers not helpful me.

i create following ref:

var loginref = new firebase('https://f30s.firebaseio.com/pablo/pages/login');

i try following push:

loginref.child('clientevents').push( { create_account : true } );

the push writes firebase in proper directory structure, console produces error:

uncaught typeerror: cannot read property 'replace' of undefined

what doing wrong?


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