Your database output {web,app}
doesn't follow any proper data structure.
it would be difficult to iterate over this.
I assume it is a String
Edit:
if it is a string you write a js to get that as a convenient data structure (array)
* def pList = function(x) { return x.replace("{","").replace("}","").split(",") }
now pass your particular value to this function and it would give you an array of values which you can easily match
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