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  • Rails link from one model to another based on db field?

    - by Danny McClelland
    Hi Everyone, I have a company model and a person model with the following relationships: class Company < ActiveRecord::Base has_many :kases has_many :people def to_s; companyname; end end class Person < ActiveRecord::Base has_many :kases # foreign key in join table belongs_to :company end In the create action for the person, I have a select box with a list of the companies, which assigns a company_id to that person's record: <%= f.select :company_id, Company.all.collect {|m| [m.companyname, m.id]} %> In the show view for the person I can list the company name as follows: <%=h @person.company.companyname %> What I am trying to work out, is how do I make that a link to the company record? I have tried: <%= link_to @person.company.companyname %> but that just outputs the company name inside a href tag but links to the current page. Thanks, Danny

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  • Django: Filtering datetime field by *only* the year value?

    - by unclaimedbaggage
    Hi folks, I'm trying to spit out a django page which lists all entries by the year they were created. So, for example: 2010: Note 4 Note 5 Note 6 2009: Note 1 Note 2 Note 3 It's proving more difficult than I would have expected. The model from which the data comes is below: class Note(models.Model): business = models.ForeignKey(Business) note = models.TextField() created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) class Meta: db_table = 'client_note' @property def note_year(self): return self.created.strftime('%Y') def __unicode__(self): return '%s' % self.note I've tried a few different ways, but seem to run into hurdles down every path. I'm guessing an effective 'group by' method would do the trick (PostGres DB Backend), but I can't seem to find any Django functionality that supports it. I tried getting individual years from the database but I struggled to find a way of filtering datetime fields by just the year value. Finally, I tried adding the note_year @property but because it's derived, I can't filter those values. Any suggestions for an elegant way to do this? I figure it should be pretty straightforward, but I'm having a heckuva time with it. Any ideas much appreciated.

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  • BCrypt says long, similar passwords are equivalent - problem with me, the gem, or the field of crypt

    - by PreciousBodilyFluids
    I've been experimenting with BCrypt, and found the following. If it matters, I'm running ruby 1.9.2dev (2010-04-30 trunk 27557) [i686-linux] require 'bcrypt' # bcrypt-ruby gem, version 2.1.2 @long_string_1 = 'f287ed6548e91475d06688b481ae8612fa060b2d402fdde8f79b7d0181d6a27d8feede46b833ecd9633b10824259ebac13b077efb7c24563fce0000670834215' @long_string_2 = 'f6ebeea9b99bcae4340670360674482773a12fd5ef5e94c7db0a42800813d2587063b70660294736fded10217d80ce7d3b27c568a1237e2ca1fecbf40be5eab8' def salted(string) @long_string_1 + string + @long_string_2 end encrypted_password = BCrypt::Password.create(salted('password'), :cost => 10) puts encrypted_password #=> $2a$10$kNMF/ku6VEAfLFEZKJ.ZC.zcMYUzvOQ6Dzi6ZX1UIVPUh5zr53yEu password = BCrypt::Password.new(encrypted_password) puts password.is_password?(salted('password')) #=> true puts password.is_password?(salted('passward')) #=> true puts password.is_password?(salted('75747373')) #=> true puts password.is_password?(salted('passwor')) #=> false At first I thought that once the passwords got to a certain length, the dissimilarities would just be lost in all the hashing, and only if they were very dissimilar (i.e. a different length) would they be recognized as different. That didn't seem very plausible to me, from what I know of hash functions, but I didn't see a better explanation. Then, I tried shortening each of the long_strings to see where BCrypt would start being able to tell them apart, and I found that if I shortened each of the long strings to 100 characters or so, the final attempt ('passwor') would start returning true as well. So now I don't know what to think. What's the explanation for this?

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  • MySQL: Is it possible to compute MAX( AVG (field) )?

    - by Brad
    My current query reads: SELECT entry_id, user_id, cat_id, AVG( rating ) as avg_rate FROM entry_rate WHERE 1 GROUP BY entry_id cat_id relates to different categories: 1, 2, 3 or 4 Is there a way I can find the maximum average for each user in each category without setting up an additional table? The return could potentially be 4 maximum avg_rate for each user_id Visit the link below for example: http://lh5.ggpht.com/_rvDQuhTddnc/S8Os_77qR9I/AAAAAAAAA2M/IPmzNeYjfCA/s800/table1.jpg

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  • How to access private static target field in aspect in AspectJ?

    - by LihO
    I have a simple class Main with private static int x and an aspect that should output the old value of x before it is reassigned: public class Main { private static int x; public static void main(String[] args) { foo(7); } public static void foo(int y) { x = y; } } and MonitorX.aj: public aspect MonitorX { before() : set(static int Main.x){ System.out.println(Main.x); } } which doesn't work since I can't access private x using Main.x. I've also tried: before(int t) : set(static int Main.x) && target(t){ System.out.println(t); } which doesn't work either (nothing is outputted, if I try to output string, it seems that the aspect isn't invoked at all). However printing out the new value that is being assigned works: before(int newVal) : set(static int Main.x) && args(newVal){ System.out.println(newVal); } What am I missing?

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  • How to interpret the contents of /proc/bus/pci/devices ?

    - by vivekian2
    The first few fields of 'cat /proc/bus/pci/devices' are understandable. Field 1 - BusDevFunc Field 2 - Vendor Id + Device Id Field 3 - Interrupt Line Field 4 - BAR 0 and the rest of the BAR registers (0 - 5) after that. After the BAR registers are printed out, what are the other fields? Specifically, what PCI configuration space registers(offsets) are printed out?

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  • Use database field maxlength as html layout input maxlength best practice. asp.net mvc

    - by Andrew Florko
    Hello everybody, There are string length limitations in database structure (email is declared as nvarchar[30] for instance) There are lots of html forms that has input textbox fields that should be limited in length for that reason. What is the best practice to synchronize database fields and html layout input fields length limitations ? Can it be done automatically (html layout input fields declared the same max length as database data they represent)? Thank you in advance.

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  • about friendfeed search parameter.

    - by user285020
    has anyone find out why FriendFeed advanced search result url doesn't have not search field parameter? some example: contains the words field, when you inputs a text "ok" and push search, then response url is http://friendfeed.com/search?q=ok if you also inputs a text into words in the title field, like texts "I'm", response url is http://friendfeed.com/search?q=ok+intitle%3Ai%27m well, pretty beautiful. not like other site response all field even you don't push a text into. anyone know how to make this effect?

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  • how do i change the value of an input field with jquery?

    - by Lina
    Hi, i'm trying to use jquery to change the value of an input text box, but it's not working, here is my code... <form method="get"> <input id="temp" type="text" name="here" value="temp value" /> <input class="form" type="radio" value="1" name="someForm" /> Enter something Here: <input id="input" type="text" name="here" value="test value" /> </form> <script> var cachedAjax = new Object(); $(document).ready(function () { $('.form').click(function () { var newvalue = $("#input").val(); $("#temp").val(newvalue); $("input").val($(temp).val()); }); }); </script> the value of the "#input" text box is not changing!!!!!! why is that??? what am i missing??? thanks a 10 million in advance

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  • Is there a way to sort by more than one field in Crystal Reports?

    - by John at CashCommons
    I'm using Crystal Report with VB.NET in Visual Studio 2005. I have report that works if I pass in a list of List(Of Stuff). I had been sorting the report by one of the members of Stuff but a need now to sort first by one member, like Stuff.StatusCode and then by another member, like Stuff.ItemNumber. Can I do this just be having more than one SortField member, or do I need to do it some other way? Thanks as always!

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  • What is the fastest way to validate that a field has no more than n words?

    - by James A. Rosen
    I have a Ruby-on-Rails model: class Candidate < ActiveRecord::Base validates_presence_of :application_essay validate :validate_length_of_application_essay protected def validate_length_of_application_essay return if application_essay.blank? # don't add a second error message if they didn't fill it out errors.add(:application_essay, :too_long), unless ... end end Without dropping into C, what is the fastest way to check that the application_essay contains no more than 500 words? You can assume that most essays will be at least 200 words, are unlikely to be more than 5000 words, and are in English (or the pseudo-English sometimes called "business-ese"). You can also classify anything you want as a "word" as long as your classification would be immediately obvious to a typical user. (NB: this is not the place to debate what a "typical user" is :) )

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  • how to cast c++ smart pointer up and down

    - by user217428
    two clients communicate to each other on top of a message layer in the message body, I need include a field pointing to any data type From client A, I send the field as a shared_ptr to the message layer. I define this field as a shared_ptr in the message layer. But how can I convert this field back to shared_ptr in client B? Or should I define shared_ptr in message layer as something else? Thanks

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  • How can I add a field with an array value to my Perl object?

    - by superstar
    What's the difference between these two constructors in perl? 1) sub new { my $class = shift; my $self = {}; $self->{firstName} = undef; $self->{lastName} = undef; $self->{PEERS} = []; bless ($self, $class); return $self; } 2) sub new { my $class = shift; my $self = { _firstName => shift, _lastName => shift, _ssn => shift, }; bless $self, $class; return $self; } I am using the second one so far, but I need to implement the PEERS array in the second one? How do I do it with the second constructor and how can we use get and set methods on those array variables?

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  • Django - Can you use property as the field in an aggregation function?

    - by orokusaki
    I know the short answer because I tried it. Is there any way to accomplish this though (even if only on account of a hack)? class Ticket(models.Model): account = modelfields.AccountField() uuid = models.CharField(max_length=36, unique=True) created = models.DateTimeField(auto_now_add=True) class Meta: ordering = ['created'] @property def repair_cost(self): # cost is a @property of LineItem(models.Model) return self.lineitem_set.aggregate(models.Sum('cost'))

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  • How to SELECT the last 10 rows of an SQL table which has no ID field?

    - by Edward Tanguay
    I have an MySQL table with 25000 rows. This is an imported CSV file so I want to look at the last ten rows to make sure it imported everything. However, since there is no ID column, I can't say: SELECT * FROM big_table ORDER BY id DESC What SQL statement would show me the last 10 rows of this table? The structure of the table is simply this: columns are: A, B, C, D, ..., AA, AB, AC, ... (like Excel) all fields are of type TEXT

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  • How do I determine if form field is empty with jQuery?

    - by user338413
    I've got a form with two fields, firstname and lastname. The user does not have to fill in the fields. When the user clicks the submit button, a jquery dialog displays with the data the user entered in the form. I only want to show the data for the fields that were entered. I'm trying to do an if statement and use the length() function but it isn't working. Help would be great! Here is my dialog jquery script: $(function(){ //Initialize the validation dialog $('#validation_dialog').dialog({ autoOpen: false, height: 600, width: 600, modal: true, resizable: false, buttons: { "Submit Form": function() { document.account.submit(); }, "Cancel": function() { $(this).dialog("close"); } } }); // Populate the dialog with form data $('form#account').submit(function(){ $("p#dialog-data").append('<span>First Name: </span>'); $("p#dialog-data").append('<span>'); $("p#dialog-data").append($("input#firstname").val()); $("p#dialog-data").append('</span><br/>'); if (("input#lastname").val().length) > 0) { $("p#dialog-data").append('<span>Last Name: </span>'); $("p#dialog-data").append('<span>'); $("p#dialog-data").append($("input#lastname").val()); $("p#dialog-data").append('</span><br/>'); }; $('#validation_dialog').dialog('open'); return false; }); });

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