(2)鎶妏ayment_type瀛楁鍒嗙鎴愪竴涓〃銆?/font>
絎竴涓浉瀵圭畝鍗曚竴鐐癸紝鏈鐪佷簨鍎跨殑鍔炴硶鏄紝璁劇疆涓涓爣蹇楀瓧孌碉紝鐒跺悗鍦╨ayout/store.html.erb涓垽鏂竴涓嬨?br /> 絎簩涓氨姣旇緝澶嶆潅錛?br /> (1) generate migration, 閲嶅緩鏁版嵁琛紝淇敼鏁版嵁琛?br /> (2) generate model PaymentType ,淇敼Order錛屾坊鍔犱竴瀵逛竴鐨勬槧灝勫叧緋匯?br /> (3) 淇敼store_controller錛屽湪checkout涓姞鍏payment_types鐨勫彇寰楁柟娉曪紝灝嗗搴旂殑view涓璼elect閮ㄥ垎鐨勯潤鎬佹暟緇勬敼鎴愯繖涓狜payment_types銆?br /> (4)鍥犱負榪欎釜payment_type姣旇緝鐗規畩錛屽湪order閲屽ご騫朵笉淇濆瓨type鐨刬d錛岃屾槸淇濆瓨name錛堝氨鏄緝鍐欙級錛屾墍浠ョ紪鐮佺殑鏃跺欓渶瑕佹敞鎰忓瓧孌電殑瀵瑰簲鍏崇郴銆備笉榪囨敞鎰忎竴涓嬬殑璇濓紝闂涓嶅ぇ銆?/font>
緇撴灉錛岀浜屼釜璺戝嚭鏉ユ湁闂錛屽湪checkout欏甸潰杈撳叆璁㈠崟淇℃伅騫墮夋嫨鏀粯鏂瑰紡錛屽叏閫氳繃錛屽垯娌￠棶棰橈紝鏁版嵁搴撻噷涔熼兘姝ｇ‘銆備絾鏄竴鏃︽湁浠諱綍杈撳叆涓虹┖鎴栦笉鍚堥鏈燂紝鍒欐姤閿欙細
You have a nil object when you didn't expect it!You might have expected an instance of Array.The error occurred while evaluating nil.map鍌諱簡……
鍥犱負瀵筽ayment_type鐨勮幏鍙栨柟娉曚篃涓嶆槸寰堣偗瀹氾紝鎵浠ヤ竴寮濮嬫鐤戦棶棰樺嚭鍦ㄨ〃緇撴瀯鏄犲皠鍏崇郴涓婏紝鍙嶅媯楠屽悗娌″彂鐜伴棶棰樸?br />
鐒跺悗鎬鐤戦〉闈紶鍙傞棶棰橈紝鍙傛暟浼犱笉鍒拌繖縐峳p闂……鍔犱箣涔嬪墠鏈夊嚑澶剅ails鐗堟湰鍖哄埆錛岃寰楀rails鐨勪竴浜涚害瀹氳繕鏄笉澶簡瑙ｃ?br />
鐒跺悗璇曠潃淇敼欏甸潰錛屽皢checkout view鐨剆elect閭ｄ竴孌?br />
collection_select :pay_type,:name,@pay_types,:name,:display_name, options={:prompt=>"Select a payment type"}
鏀規垚
if @pay_types then collection_select :pay_type,:name,@pay_types,:name,:display_name, options={:prompt=>"Select a payment type"}else form.select :pay_type錛孭aymentTypes::STATIC_TPYES, :prompt=>"Select a payment type"end
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蹇界劧涓涓嬫兂璧鳳紝瑕佹槸@pay_types涓虹┖鐨勮瘽錛岀涓涓幓鎸夐挳鐨勪換鍔′篃搴旇涓嶆垚鍔燂紝媯鏌ヤ簡涓涓嬶紝鐨勭‘濡傛銆?/font>
浣哻heckout欏甸潰紜‘瀹炲疄鐨勬樉紺哄嚭鏉ヤ簡錛岃鏄巆heckout view琚皟鐢ㄤ簡錛岀劧鑰屽弬鏁版槸絀虹殑銆傝繖鏄垜鎯沖埌鐪嬬湅checkout涔嬪悗鏈変簺浠涔堟搷浣溾斺?br />
checkout鎻愪氦鍒皊ave_order錛屾垚鍔熷垯閲嶅畾鍚戝埌Index錛岃屽け璐ュ垯render鍒癱heckout欏甸潰銆?br />
娉ㄦ剰鍒拌繖閲岀殑render銆俽ender鍜宺edirect_to閮戒細鏍規嵁checkout.html.erb鐨勫唴瀹硅繘琛屽竷灞錛岃屼簩鑰呯殑鍖哄埆鍦ㄤ簬錛宺edirect_to浼氶噸瀹氬悜鍒癮ction瀵瑰簲鐨勫嚱鏁頒腑閲嶆柊鎵ц錛岃宺ender鍒欎笉浼氥傚叿浣撳湪榪欓噷鍖哄埆灝辨槸render涓嶄細鎵цcheckout閲屽叧浜庤幏鍙?br />
@pay_type鐨勯偅涓孌甸昏緫錛屼粠鑰屽鑷碄pay_type涓虹┖錛岃嚜鐒跺憟鐜板嚭鏉ョ殑html涓瑻pay_type灝變細鍑洪敊銆?/font>
鍦╯ave_order閲岄潰鍔犱笂鐢熸垚@pay_types鐨勫垵濮嬪寲鏂規硶錛屽埛鏂頒箣鍚庨棶棰樿В鍐熾?br /> 闂搴旇鏄壘鍒頒簡錛屼絾涓嶇煡閬撴槸涓嶆槸鏈濂界殑瑙ｅ喅鍔炴硶銆傚洜涓簊ave_order鍜宑heckout涓瓨鍦ㄤ唬鐮侀噸澶嶏紝鍙互鑰冭檻閲嶆瀯涓涓嬨?/font>
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