Extract structured errors on run and submit

app/models/structured_error.rb

@@ -1,4 +1,12 @@
 class StructuredError < ActiveRecord::Base
   belongs_to :error_template
   belongs_to :file, class_name: 'CodeOcean::File'
+
+  def self.create_from_template(template, message_buffer)
+    instance = self.create(error_template: template)
+    template.error_template_attributes.each do |attribute|
+      StructuredErrorAttribute.create_from_template(attribute, instance, message_buffer)
+    end
+    instance
+  end
 end

app/models/structured_error_attribute.rb

@@ -1,4 +1,9 @@
 class StructuredErrorAttribute < ActiveRecord::Base
   belongs_to :structured_error
   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)
+  end
 end