[Cppcms-users] Accessing sub collections in a <% foreach %> loop

[Ronnie C. <ron...@db...>]

Hi

I'm trying to achieve the following piece of functionality.
I have a std::map with some keys, and a 2nd map with more keys.
If the 2nd map has a key from the first map then I want to iterate over the 
values.

I've done the following which works but is a bit hackish. I created a tmp 
variable that's assigned per loop so that it can be accessed from the 
foreach. Ideally I'd want to get rid of the C++ section completely. I'm 
guessing there probably is a way but I've just missed it

Any thoughts?

My Content looks like
		// Fields
		std::map<std::string,std::vector<std::string>> rms_fields;
		std::map<std::string,std::vector<std::string>> xdb_fields;
		
		// Tmp needed for cppcms foreach
		std::vector<std::string> tmp_fields;

And tmpl file

				<% foreach pair in rms_fields %>
				   	<% item %>
					   <!-- If field is in both rms and 
xdb then display across -->
					   <% if 
(content.xdb_fields.find(pair.first) == content.xdb_fields.end()) %>
				   	  	   <tr><td><%= pair.first %>
</td>
						   <% foreach field in 
pair.second %>
				   		   	  <% item %>
				   	  		  	 <td><%= 
field %></td>
				   			  <% end %>
					 	   <% end %>
						   <td>-></td>
						   <td>XDB Trade</td>
				   		   </tr>
					   <% else %>
					   	  <!-- Display the RMS 
fields first -->
				   	  	   <tr><td><%= pair.first %>
</td>
						   <% foreach field in 
pair.second %>
				   		   	  <% item %>
				   	  		  	 <td><%= 
field %></td>
				   			  <% end %>
					 	   <% end %>
						   <td>-></td>
					   	  <!-- Then the XDB fields, 
I create a temporary variable in my content data structure in order to be 
able to access it here
						         but really I was to 
use it as a value in the "in" statement of the foreach below.
						-->
						  <% c++ content.tmp_fields 
= content.xdb_fields.find(pair.first)->second; %>
						   <% foreach field in 
tmp_fields %>
				   		   	  <% item %>
				   	  		  	 <td><%= 
field %></td>
				   			  <% end %>
					 	   <% end %>
				   		   </tr>
					   <% end %>
					<% end %>
				<% end %>


Thanks

Kind Regards
Ronnie