user.writer? # NoMethodError: undefined method `writer?' for nil:NilClass user.try(:writer?) #=> nil class NilClass def try(*args) nil end ... end BDUJWFTVQQPSUMJCBDUJWF@TVQQPSUDPSF@FYUPCKFDUUSZSC
&b) try!(*a, &b) if a.empty? || respond_to?(a.first) end ... end end class Object include ActiveSupport::Tryable end ... BDUJWFTVQQPSUMJCBDUJWF@TVQQPSUDPSF@FYUPCKFDUUSZSC
NoMethodError: undefined method `writter?' for #<User:0x007fcd4b843b20> # Did you mean? writer? user&.(:writter?) # NoMethodError: undefined method `call' for #<User:0x007fcd4b843b20>
NT 8SJUFGSBHNFOUWJFXTBSUJDMFTEEDBGCDCD⒎FF NT 3FOEFSFEBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO NT 3FOEFSJOHBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO $PVMEOUpOEUFNQMBUFGPSEJHFTUJOHBSUJDMFTDPNNPO@QBSUJBM 3FBEGSBHNFOUWJFXTBSUJDMFTEEDBGCDCD⒎FF NT 3FOEFSFEBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO NT มߋલ มߋޙ
3FOEFSFEBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO NT 3FOEFSJOHBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO 3FBEGSBHNFOUWJFXTBSUJDMFTFFGECDD NT 3FOEFSFEBQQMJDBUJPO@DPNNPO@QBSUJBMIUNMTMJN NT 8SJUFGSBHNFOUWJFXTBSUJDMFTFFGECDD NT 3FOEFSFEBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO NT มߋલʢΩϟογϡͳ͠ʣ มߋޙ 3FOEFSJOHBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO 3FBEGSBHNFOUWJFXTBSUJDMFTCGDEC NT 3FOEFSFEBSUJDMFTTIPXIUNMTMJNXJUIJOMBZPVUTBQQMJDBUJPO NT มߋલʢΩϟογϡ͋Γʣ
= @article.build_ogp_info end def create @ogp_info = @article.build_ogp_info(ogp_info_params) if @ogp_info.save redirect_to article_ogp_info_url(@article), notice: 'OGPใΛ࡞͠·ͨ͠ɻ' else render :new end end ... private def set_article @article = Article.find(params[:article_id]) end end