init project

app/views/challenges/edit_choose_question.json.jbuilder

@@ -0,0 +1,11 @@
+json.(@challenge_choose, :challenge_id, :subject, :answer,
+    :standard_answer, :score, :difficult,
+    :position, :category)
+json.st @challenge.st
+# 选项的参数
+json.choose_contents @challenge_choose.challenge_questions do |question|
+  json.(question, :option_name, :position, :right_key)
+end
+
+json.tags @challenge_choose.challenge_tags.map(&:name)
+