new queries: listing of blogs that ignores empty blogs; listing for type instances

browser/concept.py

@@ -320,6 +320,10 @@ class ConceptView(BaseView):
                 if r.order != pos:
                     r.order = pos
 
+    @Lazy
+    def filterOptions(self):
+        return self.getOptions('filter.states')
+
     def getChildren(self, topLevelOnly=True, sort=True, noDuplicates=True,
                     useFilter=True, predicates=None):
         form = self.request.form
@@ -361,8 +365,7 @@ class ConceptView(BaseView):
                 options = IOptions(adapted(r.predicate), None)
                 if options is not None and options('hide_children'):
                     continue
-                filterOptions = self.getOptions('filter.states')
-                if not fv.check(r.context, filterOptions):
+                if not fv.check(r.context, self.filterOptions):
                     continue
             yield r
 
@@ -718,3 +721,22 @@ class ListChildren(ConceptView):
     def macro(self):
         return concept_macros.macros['list_children']
 
+
+class ListTypeInstances(ListChildren):
+
+    @Lazy
+    def targets(self):
+        targetPredicate = self.conceptManager['querytarget']
+        for c in self.context.getChildren([targetPredicate]):
+            # TODO: use type-specific view
+            yield ConceptView(c, self.request)
+
+    def children(self, topLevelOnly=True, sort=True, noDuplicates=True,
+                    useFilter=True, predicates=None):
+        # TODO: use filter options of query for selection of children
+        for tv in self.targets:
+            tv.filterOptions = self.filterOptions
+            for c in tv.getChildren(topLevelOnly, sort,
+                                    noDuplicates, useFilter, [self.typePredicate]):
+                yield c
+

browser/configure.zcml

@@ -545,6 +545,14 @@
       factory="loops.browser.concept.ListChildren"
       permission="zope.View" />
 
+  <zope:adapter
+      name="list_type_instances.html"
+      for="loops.interfaces.IConcept
+           zope.publisher.interfaces.browser.IBrowserRequest"
+      provides="zope.interface.Interface"
+      factory="loops.browser.concept.ListTypeInstances"
+      permission="zope.View" />
+
   <!-- dialogs/forms (end-user views) -->
 
   <page

compound/blog/browser.py

@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2012 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2013 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -55,6 +55,32 @@ actions.register('createBlogPost', 'portlet', DialogAction,
 )
 
 
+# blog lists
+
+class BlogList(ConceptView):
+
+    @Lazy
+    def macro(self):
+        return view_macros.macros['bloglist']
+
+    def children(self, topLevelOnly=True, sort=True, noDuplicates=True,
+                    useFilter=True, predicates=None):
+        rels = self.getChildren(topLevelOnly, sort,
+                            noDuplicates, useFilter, predicates)
+        return [rel for rel in rels if self.notEmpty(rel)]
+
+    def notEmpty(self, rel):
+        if self.request.form.get('filter.states') == 'all':
+            return True
+        # TODO: use type-specific view
+        view = ConceptView(rel.relation.second, self.request)
+        for c in view.children():
+            return True
+        return False
+
+
+# blog view
+
 def supplyCreator(self, data):
     creator = data.get('creator')
     data['creatorId'] = creator
@@ -128,6 +154,8 @@ class BlogView(ConceptView):
         return False
 
 
+# blog post view
+
 class BlogPostView(ConceptView):
 
     @Lazy
@@ -171,6 +199,8 @@ class BlogPostView(ConceptView):
             yield self.childViewFactory(r, self.request, contextIsSecond=True)
 
 
+# forms and form controllers
+
 class EditBlogPostForm(EditConceptForm):
 
     title = _(u'Edit Blog Post')

compound/blog/configure.zcml

@@ -37,6 +37,15 @@
 
   <!-- views -->
 
+  <zope:adapter
+      name="bloglist.html"
+      for="loops.interfaces.IConcept
+           zope.publisher.interfaces.browser.IBrowserRequest"
+      provides="zope.interface.Interface"
+      factory="loops.compound.blog.browser.BlogList"
+      permission="zope.View"
+      />
+
   <zope:adapter
       name="blog.html"
       for="loops.interfaces.IConcept

compound/blog/view_macros.pt

@@ -1,3 +1,12 @@
+<html i18n:domain="loops">
+
+
+<metal:block define-macro="bloglist">
+  <div tal:define="show_headline nothing">
+    <metal:fields use-macro="item/template/macros/concepttitle" /><br />
+    <metal:fields use-macro="item/template/macros/conceptchildren" />
+  </div>
+</metal:block>
 
 
 <metal:block define-macro="blog">
@@ -74,3 +83,6 @@
   <metal:resources use-macro="view/concept_macros/conceptresources" />
   <metal:block use-macro="view/comment_macros/comments" />
 </div>
+
+
+</html>