passing a symbol for "format" silently disables validation

[Roguelazer]

JSONSchemer.schema({'format' => 'date'}).valid?("foo")
JSONSchemer.schema({'format' => :date}).valid?("foo")

This is very surprising! I feel like fetch_format might want to cast the input to a string. What do you think?

[davishmcclurg]

I agree it's annoying. format isn't a special case, though, so changing this would mean supporting symbols for all schema values. I reluctantly added support for symbol schema keys (ie, {format: 'date'} works), but keys are more constrained than values. I'm still open to supporting symbol values, though likely not soon.

In the mean time, if you have schemas that may not be valid, you can use JSONSchemer.valid_schema? to check them:

>> JSONSchemer.valid_schema?({'format' => 'date'})
=> true
>> JSONSchemer.valid_schema?({'format' => :date})
=> false