Add support for GraphQL pagination

app/graph/types/commentable_interface.rb

@@ -1,6 +1,8 @@
 CommentableInterface = GraphQL::InterfaceType.define do
   name "Commentable"
 
+  # Expose fields associated with Commentable models
+
   field :id, !types.ID, "ID of the commentable"
   field :title, types.String, "The title of this commentable"
   field :description, types.String, "The description of this commentable"
@@ -8,7 +10,12 @@ CommentableInterface = GraphQL::InterfaceType.define do
   field :comments_count, types.Int, "Number of comments on this commentable"
 
   # Linked resources
+
   field :author, UserType, "Author of this commentable"
-  field :comments, !types[!CommentType], "Comments in this commentable"
+
+  connection :comments, CommentType.connection_type do
+    description "Comments in this commentable"
+  end
+
   field :geozone, GeozoneType, "Geozone affected by this commentable"
 end

app/graph/types/debate_type.rb

@@ -5,6 +5,7 @@ DebateType = GraphQL::ObjectType.define do
   interfaces([CommentableInterface])
 
   # Expose fields associated with Debate model
+
   field :id, !types.ID, "The id of this debate"
   field :title, types.String, "The title of this debate"
   field :description, types.String, "The description of this debate"
@@ -19,7 +20,12 @@ DebateType = GraphQL::ObjectType.define do
   field :geozone_id, types.Int, "ID of the geozone affected by this debate"
 
   # Linked resources
+  
   field :author, UserType, "Author of this debate"
-  field :comments, !types[!CommentType], "Comments in this debate"
+
+  connection :comments, CommentType.connection_type do
+    description "Comments in this debate"
+  end
+
   field :geozone, GeozoneType, "Geozone affected by this debate"
 end

app/graph/types/proposal_type.rb

@@ -3,8 +3,9 @@ ProposalType = GraphQL::ObjectType.define do
   description "A single proposal entry returns a proposal with author, total votes and comments"
 
   interfaces([CommentableInterface])
-  
+
   # Expose fields associated with Proposal model
+
   field :id, !types.ID, "The id of this proposal"
   field :title, types.String, "The title of this proposal"
   field :description, types.String, "The description of this proposal"
@@ -22,7 +23,12 @@ ProposalType = GraphQL::ObjectType.define do
   field :retired_explanation, types.String, "Explanation why this proposal was retired"
 
   # Linked resources
+
   field :author, UserType, "Author of this proposal"
-  field :comments, !types[!CommentType], "Comments in this proposal"
+
+  connection :comments, CommentType.connection_type do
+    description "Comments in this proposal"
+  end
+
   field :geozone, GeozoneType, "Geozone affected by this proposal"
 end

app/graph/types/query_root.rb

@@ -11,8 +11,7 @@ QueryRoot = GraphQL::ObjectType.define do
     }
   end
 
-  field :proposals do
-    type !types[!ProposalType]
+  connection :proposals, ProposalType.connection_type do
     description "Find all Proposals"
     resolve -> (object, arguments, context) {
       Proposal.all
@@ -28,8 +27,7 @@ QueryRoot = GraphQL::ObjectType.define do
     }
   end
 
-  field :debates do
-    type !types[!DebateType]
+  connection :debates, DebateType.connection_type do
     description "Find all Debates"
     resolve -> (object, arguments, context) {
       Debate.all
@@ -45,8 +43,7 @@ QueryRoot = GraphQL::ObjectType.define do
     }
   end
 
-  field :comments do
-    type !types[!CommentType]
+  connection :comments, CommentType.connection_type do
     description "Find all Comments"
     resolve -> (object, arguments, context) {
       Comment.all