javascript - Angular: Getting error while using ng-option -

i have schema:

teams: [    {       id: 1,       name: "spain"    },    {       id: 2,       name: "germany"    } ]

now have select element:

<select ng-model="betschema.winnerid" ng-options="team.name team in teams track team.id">     <option value="-1">tie</option> </select>

the betschema object looks (as default):

{    winnerid: -1 }

here result see:

enter image description here

the problems are:
1. can't see tie option, , there 1 mysteries "blank" option (the first @ top). 2. when betschema looks this:

{    winnerid: 2 }

i expecting see germany option selected.

what doing wrong?

there couple of things.

when using ng-options angular going overwrite option tags have add model such:

scope.teams = [{ id: -1, name: "tie" }, { id: 1, name: "spain" }, { id: 2, name: "germany", }];
second, can use track using "as" work in context: https://docs.angularjs.org/api/ng/directive/select. can use obj.datatobestoredinmodel obj.labelofdata obj in objlist id ng-options.

My