更改：nil判断

app/controllers/api/pm/issues_controller.rb

@@ -162,19 +162,23 @@ class Api::Pm::IssuesController < Api::Pm::BaseController
         issue.changer = changer 
         issue.updated_on = row[5]
         issue.status_id = row[6].to_i
-        row[7].split(',').each do |a| 
-          u = User.find_by(login: a)
-          next unless u.present? 
-          issue.assigners << u
+        if row[7].present?
+          row[7].split(',').each do |a| 
+            u = User.find_by(login: a)
+            next unless u.present? 
+            issue.assigners << u
+          end
         end
         issue.priority_id = row[8]
-        row[9].split(',').each_slice(2).to_a.each do |t|
-          tag = IssueTag.find_by(project_id: 0, organization_id: params[:organization_id], name: t[0])
-          if tag.present? 
-            issue.issue_tags << tag
-          else
-            tag = IssueTag.create(project_id: 0,organization_id: params[:organization_id], name: t[0], color: t[1])
-            issue.issue_tags << tag
+        if row[9].present? 
+          row[9].split(',').each_slice(2).to_a.each do |t|
+            tag = IssueTag.find_by(project_id: 0, organization_id: params[:organization_id], name: t[0])
+            if tag.present? 
+              issue.issue_tags << tag
+            else
+              tag = IssueTag.create(project_id: 0,organization_id: params[:organization_id], name: t[0], color: t[1])
+              issue.issue_tags << tag
+            end
           end
         end
         issue.start_date = row[10]