fix(builders): fixed part handling,it compiles now

What's missing is docs, which will see some work now.
I guess it will be best to hide all the prelude from the user, to allow
him to focus on what's important here.

src/mako/lib.rs.mako

@@ -34,7 +34,7 @@ use std::borrow::BorrowMut;
 use std::cell::RefCell;
 use std::default::Default;
 
-pub use cmn::{Hub, ResourceMethodsBuilder, MethodBuilder, Resource, Part, ResponseResult, RequestResult, NestedType};
+pub use cmn::{Hub, ResourceMethodsBuilder, MethodBuilder, Resource, Part, ResponseResult, RequestValue, NestedType};
 
 // ########
 // HUB ###

src/mako/lib/mbuild.mako

@@ -3,7 +3,7 @@
                       rb_type, mb_type, singular, hub_type, to_fqan, indent_all_but_first_by,
                       method_params, activity_rust_type, mangle_ident, activity_input_type, get_word,
                       split_camelcase_s, property, is_pod_property, TREF, method_io, IO_REQUEST, 
-                      RESOURCE_MARKER, schema_to_required_property, rust_copy_value_s, is_required_property)
+                      schema_to_required_property, rust_copy_value_s, is_required_property)
 %>\
 <%namespace name="util" file="util.mako"/>\
 <%namespace name="lib" file="lib.mako"/>\
@@ -18,7 +18,7 @@
 	# an identifier for a property. We prefix them to prevent clashes with the setters
 	ThisType = mb_type(resource, method) + "<'a, C, NC, A>"
 
-	request_resource = method_io(schemas, c, m, IO_REQUEST, RESOURCE_MARKER)
+	request_resource = method_io(schemas, c, m, IO_REQUEST)
 	params = method_params(m)
 	if request_resource:
 		params.insert(0, schema_to_required_property(request_resource, 'request'))
@@ -60,9 +60,9 @@ pub struct ${ThisType}
 % for p in params:
 	${property(p.name)}:\
 	% if is_required_property(p):
-	${activity_rust_type(p, allow_optionals=False)},
+ ${activity_rust_type(p, allow_optionals=False)},
 	% else:
-     ${activity_rust_type(p)},
+ ${activity_rust_type(p)},
     % endif
 % endfor
 }

src/mako/lib/rbuild.mako

@@ -1,7 +1,7 @@
 <%!
 	from util import (put_and, rust_test_fn_invisible, rust_doc_test_norun, rust_doc_comment,
                       rb_type, singular, hub_type, mangle_ident, mb_type, method_params, property,
-                      to_fqan, indent_all_but_first_by, RESOURCE_MARKER, schema_markers, 
+                      to_fqan, indent_all_but_first_by, schema_markers, 
                       activity_input_type, TREF, method_io, IO_REQUEST, schema_to_required_property, 
                       rust_copy_value_s, is_required_property)
 %>\
@@ -54,7 +54,7 @@ impl<'a, C, NC, A> ${ThisType} {
 
 	# skip part if we have a request resource. Only resources can have parts
 	# that we can easily deduce
-	request_resource = method_io(schemas, c, m, IO_REQUEST, RESOURCE_MARKER)
+	request_resource = method_io(schemas, c, m, IO_REQUEST)
 	params = method_params(m)
 	REQUEST_RESOURCE_PROPERTY_NAME = 'request'
 	if request_resource:

src/mako/lib/schema.mako

@@ -1,5 +1,5 @@
 <%! from util import (schema_markers, rust_doc_comment, mangle_ident, to_rust_type, put_and, 
-			  	      IO_TYPES, activity_split, enclose_in) 
+			  	      IO_TYPES, activity_split, enclose_in, REQUEST_MARKER) 
 %>\
 ## Create new schema with everything.
 ## 's' contains the schema structure from json to build
@@ -28,8 +28,28 @@ pub struct ${s.id}\
 impl ${marker_trait} for ${s.id} {}
 % endfor
 
-% if RESOURCE_MARKER in markers:
-
+% if REQUEST_MARKER in markers:
+impl ${s.id} {
+	/// Return a comma separated list of members that are currently set, i.e. for which `self.member.is_some()`.
+	/// The produced string is suitable for use as a parts list that indicates the parts you are sending, and/or
+	/// the parts you want to see in the server response.
+	fn to_parts(&self) -> String {
+		let mut r = String::new();
+		% for pn, p in s.properties.iteritems():
+<%
+			mn = 'self.' + mangle_ident(pn)
+			rt = to_rust_type(s.id, pn, p)
+			check = 'is_some()'
+			if rt.startswith('Vec') or rt.startswith('HashMap'):
+				check = 'len() > 0'
+%>\
+		if ${mn}.${check} { r = r + "${pn},"; }
+		% endfor
+		## remove (possibly non-existing) trailing comma
+		r.pop();
+		r
+	}
+}
 % endif
 </%def>
 

src/mako/lib/util.py

@@ -26,7 +26,6 @@ SPACES_PER_TAB = 4
 
 REQUEST_PRIORITY = 100
 REQUEST_MARKER = 'RequestValue'
-RESOURCE_MARKER = 'Resource'
 
 # ==============================================================================
 ## @name Filters
@@ -256,7 +255,7 @@ def schema_markers(s, c):
         # it should have at least one activity that matches it's type to qualify for the Resource trait
         for fqan, iot in activities.iteritems():
             if activity_name_to_type_name(activity_split(fqan)[0]).lower() == s.id.lower():
-                res.add(RESOURCE_MARKER)
+                res.add('Resource')
             if IO_RESPONSE in iot:
                 res.add('ResponseResult')
             if IO_REQUEST in iot: