Merge branch '11305-migrate-docker19-doc'

[arvados.git] / apps / workbench / app / models / arvados_resource_list.rb

diff --git a/apps/workbench/app/models/arvados_resource_list.rb b/apps/workbench/app/models/arvados_resource_list.rb
index 7a6a004991180d410b81ec66b6becb65b82d92ae..35dcde38da24cabc5290e24e0a99131f467181b4 100644 (file)
--- a/apps/workbench/app/models/arvados_resource_list.rb
+++ b/apps/workbench/app/models/arvados_resource_list.rb
@@ -2,6 +2,8 @@ class ArvadosResourceList
   include ArvadosApiClientHelper
   include Enumerable
 
+  attr_reader :resource_class
+
   def initialize resource_class=nil
     @resource_class = resource_class
     @fetch_multiple_pages = true
@@ -14,6 +16,11 @@ class ArvadosResourceList
     self
   end
 
+  def distinct(bool=true)
+    @distinct = bool
+    self
+  end
+
   def limit(max_results)
     if not max_results.nil? and not max_results.is_a? Integer
       raise ArgumentError("argument to limit() must be an Integer or nil")
@@ -77,6 +84,13 @@ class ArvadosResourceList
     self
   end
 
+  # with_count sets the 'count' parameter to 'exact' or 'none' -- see
+  # https://doc.arvados.org/api/methods.html#index
+  def with_count(count_param='exact')
+    @count = count_param
+    self
+  end
+
   def fetch_multiple_pages(f)
     @fetch_multiple_pages = f
     self
@@ -97,7 +111,6 @@ class ArvadosResourceList
     @items_available = r.items_available if r.respond_to? :items_available
     @result_limit = r.limit if r.respond_to? :limit
     @result_offset = r.offset if r.respond_to? :offset
-    @result_links = r.links if r.respond_to? :links
     @results
   end
 
@@ -147,44 +160,23 @@ class ArvadosResourceList
   end
 
   def items_available
+    results
     @items_available
   end
 
   def result_limit
+    results
     @result_limit
   end
 
   def result_offset
+    results
     @result_offset
   end
 
-  def result_links
-    @result_links
-  end
-
-  # Return links provided with API response that point to the
-  # specified object, and have the specified link_class. If link_class
-  # is false or omitted, return all links pointing to the specified
-  # object.
+  # Obsolete method retained during api transition.
   def links_for item_or_uuid, link_class=false
-    return [] if !result_links
-    unless @links_for_uuid
-      @links_for_uuid = {}
-      result_links.each do |link|
-        if link.respond_to? :head_uuid
-          @links_for_uuid[link.head_uuid] ||= []
-          @links_for_uuid[link.head_uuid] << link
-        end
-      end
-    end
-    if item_or_uuid.respond_to? :uuid
-      uuid = item_or_uuid.uuid
-    else
-      uuid = item_or_uuid
-    end
-    (@links_for_uuid[uuid] || []).select do |link|
-      link_class == false or link.link_class == link_class
-    end
+    []
   end
 
   protected
@@ -193,15 +185,22 @@ class ArvadosResourceList
     api_params = {
       _method: 'GET'
     }
+    api_params[:count] = @count if @count
     api_params[:where] = @cond if @cond
     api_params[:eager] = '1' if @eager
-    api_params[:limit] = @limit if @limit
     api_params[:select] = @select if @select
     api_params[:order] = @orderby_spec if @orderby_spec
     api_params[:filters] = @filters if @filters
+    api_params[:distinct] = @distinct if @distinct
+    if @fetch_multiple_pages
+      # Default limit to (effectively) api server's MAX_LIMIT
+      api_params[:limit] = 2**(0.size*8 - 1) - 1
+    end
 
     item_count = 0
     offset = @offset || 0
+    @result_limit = nil
+    @result_offset = nil
 
     begin
       api_params[:offset] = offset
@@ -212,18 +211,22 @@ class ArvadosResourceList
                                    reader_tokens: @reader_tokens)
       items = arvados_api_client.unpack_api_response res
 
-      break if items.nil? or not items.any?
+      @items_available = items.items_available if items.respond_to?(:items_available)
+      @result_limit = items.limit if (@fetch_multiple_pages == false) and items.respond_to?(:limit)
+      @result_offset = items.offset if (@fetch_multiple_pages == false) and items.respond_to?(:offset)
 
-      @items_available = items.items_available if items.respond_to? :items_available
-      @result_limit = items.limit if items.respond_to? :limit
-      @result_offset = items.offset if items.respond_to? :offset
+      break if items.nil? or not items.any?
 
       item_count += items.size
-      offset = @result_offset + items.size
+      if items.respond_to?(:offset)
+        offset = items.offset + items.size
+      else
+        offset = item_count
+      end
 
       yield items
 
-      break if @limit.is_a? Integer and item_count >= @limit
+      break if @limit and item_count >= @limit
       break if items.respond_to? :items_available and offset >= items.items_available
     end while @fetch_multiple_pages
     self