Rails - Custom Validation For Having A Single Value Once -

-

इसलिए मेरे पास ये दो मॉडल हैं: 

  वर्ग टैग & lt; ActiveRecord :: बेस has_many: event_tags attr_accessible: tag_id,: टैग_प्रकार,: मूल्य अंत वर्ग EventTag & lt; ActiveRecord :: बेस is_to: tag attr_accessible: tag_id,: event_id,: क्षेत्र अंत   
 और टैग के लिए यह तालिका:  
  ** टैग_id ** * * टैग_type ** ** मूल्य ** 1 "मजेदार" "" बोरिंग ... "2" मज़े लेवल "" लिटिल "3" मज़े लेवल "" हेलज़ या "4" जेनेरिक "" कम जोकर की जरूरत है "5" सामान्य "" लेजर टैग "...   
 मैं क्या करना चाहता हूं एक कस्टम सत्यापन लिखा है, जहां यह देखने की जांच करता है:  
     
  •  प्रत्येक इवेंट_आईड में  केवल <   
     
      t1 =      EventTag.new (: टैग_id = & gt; 1 ,: event_id = & gt; 777,: क्षेत्र = & gt; 'यूएस') t1.save # सफलता t2 = EventTag.new (: टैग_id = & gt; 2,: event_id = & gt; 777,: क्षेत्र = & gt; 'यूएस') t2.save # failure # क्योंकि (event_id: 777) में पहले से ही "funLevel" का एक tag_type संबद्ध है t3 = EventTag.new (: tag_id = & gt; 4,: event_id = & Gt; 777,: क्षेत्र = & gt; 'यूएस') t3.save # सफलता, क्योंकि (टैग_id: 4) "मजेदार लेवल" प्रकार नहीं है   
      def cannot_have_multiple_funLevel_tag list_of_tag_ids = EventTag.where ("event_id =?", Event_id) .pluck (: tag_id) यदि (टैग। जहां ("टैग_id में?", List_of_tag_ids) .pluck (: tag_type)। शामिल करें? "FunLevel") errors.add (: tag_id, "पहले से ही एक मजेदार लेवल टैग है!") अंत   
     रेल के लिए नया होने के कारण, एक बेहतर / अधिक सुंदर / अधिक सस्ता तरीका है ?   
     
     
     जिस तरीके से आपके पास अपना डेटा संरचित है इसका मतलब है कि इनबिल्ट रेल मान्यताओं संभवत: एक आप के लिए मदद का ढेर  यदि   मजेदार लेवल  विशेषता को  EventTag  वर्ग से सीधे पहुँचा जा सकता है, तो आप ऐसा ही कुछ इस्तेमाल कर सकते हैं:  
      # Event_tag.rb मान्य: टैग प्रकार, विशिष्टता: {गुंजाइश:: event_id}, यदि: Proc.new {| टैग | Tag.tag_type == "funLevel"}   
     (दुर्भाग्यवश, एक त्वरित परीक्षण से आप वर्चुअल विशेषता की विशिष्टता को मान्य करने में सक्षम नहीं लगते।)  < P> उसके बिना, आप शायद एक कस्टम सत्यापन का उपयोग कर अटक गए हैं आपके पास कस्टम सत्यापन में स्पष्ट सुधार (ऐसा लगता है कि आप  EventTag  पर सत्यापन करना चाहते हैं) मान्यता को नहीं चलाना होगा, जब तक कि  EventTag  एक < Code> funLevel  टैग:  
      def cannot_have_multiple_funLevel_tag जब तक self.tag.tag_type == "funLevel" ... अंत    < / html>

Comments

Post a Comment

Popular posts from this blog

excel vba - How to delete Solver(SOLVER.XLAM) code -

-
After opening several examples of macro / code written, I suddenly get stuck with a code that seems safe. Solver (SOLVER.XLAM) is doing this notation and I would like to remove it from my system. I do not think this is a relativant code. Can anyone tell me what should I do? I have already installed something to remove the password but Solver is still asking for password and I can not get rid of it! itemprop = "text"> Solver Excel is add-in If you want to delete it, then Excel Application & gt; Options & gt; Add-ins & gt; Search for 'Go to' button and gt; Uncheck the solver on the list like press something (I can not give you the exact path because I have the Polish version of Excel). Trying to open Solver's VBA code is not good because it There is allegedly copyright. Besides, I do not think Solver creates any disadvantages while working with Excel or VBA.
Read more

github - Teamcity & Git - PR merge builds - anyway to get HEAD commit hash? -

-
I have a team city build project with Gitbab VCS route, I have been triggered for both / head on PR and / Merge the referee. The annoying thing is that you can not do anything useful with the merged hash - it is not present in Gitobb. I want to exclude newsgate packages with head in gutub comet situations in the version number along with Hewash (Newsaging 7) for the music build, but against head hash. However, I can not see a way to get the head hashes while constructing that merge. I just want to head because it's useless - we only care about merge. (PR - Pull Request) This command works reliably while running One on / merge is git log --no-merge -1 ---- = '% h'
Read more

ios - Replace text in UITextView run slowly -

-
I have a UITextView and I change a word like the code at the end of UITextView.text: - (void) Replace TexttechWitWord: (NSString *) word {NSString * currentTextViewText = self.textView.text; CurrentTextViewText = [currentTextViewText stringByReplacingCharactersInRange: NSMakeRange ([self.textView.text length] - [word length], [word length]) withString: word; Self.textView.text = currentTextViewText; } Replacement work is fine, but it runs very slowly and very slowly when the textView now lengthens Is there any better way? I try the replacement range: with text for a week but still stuck. Not to know how to use it to replace it in your case. Please guide! Thanks in advance! This is an important job. As you are using an irreversible string and you are creating a very long string and before Assigned to NSString created from. NSString will be used instead of NSMutableString . - (UITableViewCell *) TableView: (UITableView *) Table View CellForOutPath: (NSIndex...
Read more