Re: [Cppcms-users] Is there any way to get a list of key values from a JSON object?

[Daniel V. <chi...@gm...>]

using cppcms;

        try {
        	json::value v;
        	...
                
                
        	// test if object "types" exist
        	json::object& o types = v.at("types").object();
        
        	// note that "o" is a std::map
        
        	
        	for ( json::object::iterator i = o.begin; i != o.end(); ++i)
        	{
        		// i->first contains key name
        		// i->second contains mapped value

        		...
        
        	}
        	
        	
        }
        catch(json::bad_value_cast const& e)
        {
        	//error handling
        }

Reference:

http://cppcms.com/cppcms_ref/latest/classcppcms_1_1json_1_1value.html#aa42bb35c356312bdee5a37bc0350264c
http://cppcms.com/cppcms_ref/latest/classcppcms_1_1json_1_1value.html#ac8bcaa686b3ec1ad0cc22d663bce4566
http://cppcms.com/cppcms_ref/latest/namespacecppcms_1_1json.html#a4849268540ccdea30cfa408d6706d0c9



> Would it be possible for me to query the JSON value object to find out
> that there are two "type" values in the "imageservice" bit, and that
> those types had keys of "test-type-1" and "test-type-2"?
> I've been trying & failing to achieve this.
> Thanks for any & all help,
>    Doug.