Fix structured error creation if attributes don't match; write match status to database

app/models/structured_error_attribute.rb

@@ -3,7 +3,15 @@ class StructuredErrorAttribute < ActiveRecord::Base
   belongs_to :error_template_attribute
 
   def self.create_from_template(attribute, structured_error, message_buffer)
-    value = message_buffer.match(attribute.regex).captures[0]
-    self.create(structured_error: structured_error, error_template_attribute: attribute, value: value)
+    match = false
+    value = nil
+    result = message_buffer.match(attribute.regex)
+    if result != nil
+      match = true
+      if result.captures.size > 0
+        value = result.captures[0]
+      end
+    end
+    self.create(structured_error: structured_error, error_template_attribute: attribute, value: value, match: match)
   end
 end

db/migrate/20170719133351_add_match_to_structured_error_attribute.rb

@@ -0,0 +1,5 @@
+class AddMatchToStructuredErrorAttribute < ActiveRecord::Migration
+  def change
+    add_column :structured_error_attributes, :match, :boolean
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170711170928) do
+ActiveRecord::Schema.define(version: 20170719133351) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -298,6 +298,7 @@ ActiveRecord::Schema.define(version: 20170711170928) do
     t.string   "value"
     t.datetime "created_at",                  null: false
     t.datetime "updated_at",                  null: false
+    t.boolean  "match"
   end
 
   create_table "structured_errors", force: :cascade do |t|