Comments (2)
a[$.'$type' = 'aa']
or
a[$.'$type' = 'aa'][]
will get you the answer you require.
You are right that you need to quote the $type
property name because $
is a reserved token. However, quoting it in isolation will just make it a string literal. If a string literal is a step in a location path (i.e. either side of a .
), then it will get interpreted as a property name by the parser. Adding the $.
prefix will do this.
An alternative approach is to use the $lookup
function, as follows:
a[$lookup('$type') = 'aa']
This is useful if you want to use an expression to calculate the property name at runtime.
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closing issue
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