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  • Why am I getting the error "undefined local variable or method `assigns'"?

    - by Jason
    I might be missing something basic here, but I'm stumped on this error: model code: class CachedStat < ActiveRecord::Base def self.create_stats_days_ago(days_ago, human_id) d = Date.today - days_ago.day @prs = PageRequest.find(:all, :conditions => [ "owner_type = 'Human' and owner_id = ? and created_at = ?", human_id, d] ) end end spec code: it "should create stats for the specified number of days in the past" do CachedStat.create_stats_days_ago(1, Human.first.id) assigns[:prs].should eql("foo") end The error is: undefined local variable or method `assigns' for #<Spec::Rails::Example::ModelExampleGroup::Subclass_1:0x2fbac28> I feel like I'm overlooking something obvious but it's invisible to me. Any suggestions? Thanks very much! -Jason

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  • Serial numbers generation without user data

    - by Sphynx
    This is a followup to this question. The accepted answer is generally sufficient, but requires user to supply personal information (e.g. name) for generating the key. I'm wondering if it's possible to generate different keys based on a common seed, in a way that program would be able to validate if those keys belong to particular product, but without making this process obvious to the end user. I mean it could be a hash of product ID plus some random sequence of characters, but that would allow user to guess potential new keys. There should be some sort of algorithm difficult to guess.

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  • Where is the help.py for Android's monkeyrunner

    - by Keyboardsurfer
    Hi, I just can't find the help.py file in order to create the API reference for the monkeyrunner. The command described at the Android references monkeyrunner <format> help.py <outfile> does not work when i call monkeyrunner html help.py /path/to/place/the/doc.html. It's quite obvious that the help.py file is not found and the monkeyrunner also tells me "Can't open specified script file". But a locate on my system doesn't bring me a help.py file that has anything to do with monkeyrunner or Android. So my question is: Where did they hide the help.py file for creating the API reference?

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  • Efficient most common suffix algorithm?

    - by taw
    I have a few GBs worth of strings, and for every prefix I want to find 10 most common suffixes. Is there an efficient algorithm for that? An obvious solution would be: Store sorted list of <string, count> pairs. Identify by binary search extent for prefix we're searching. Find 10 highest counts in this extent. Possibly precompute it for all short prefixes, so it doesn't ever need to look at large portion of data. I'm not sure if that would actually be efficient at all. Is there a better way I overlooked? Answers must be real time, but it can take as much preprocessing as necessary.

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  • Database design: How should I add an information which can apply to several tables

    - by Stefan
    I am constructing a database System using Mysql, this will be an application of about 20 tables. The system contains information on farmers, we work with organic certification and need to record a lot of info for that. In my system, there are related parent-child tables for farmers, producing years and fields/areas - it's a simple representation of the real world in which farmers farm crops on their fields. I now need to add several status flags for each one of these levels: a farmer can be certified, or his field can be, or the specific year can be; each of these flags has several states and can occur a number of times. The obvious solution to this would be to add a child table to every one of these tables, and define the states there. What I wonder if there is an easier way to do this to avoid getting to many tables? Where/how would be best practise to keep that data?

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  • Filter across three tables using Django

    - by Vanessa MacDougal
    I have 3 django models, where the first has a foreign key to the second, and the second has a foreign key to the third. Like this: class Book(models.Model): year_published = models.IntField() author = models.ForeignKey(Author) class Author(models.Model): author_id = models.AutoField(primary_key=True) name = models.CharField(max_length=50) agent = models.ForeignKey(LitAgent) class LitAgent(models.Model): agent_id = models.AutoField(primary_key=True) name = models.CharField(max_length=50) I want to ask for all the literary agents whose authors had books published in 2006, for example. How can I do this in Django? I have looked at the documentation about filters and QuerySets, and don't see an obvious way. Thanks.

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  • Getting my webapp to be database agnostic with Hibernate...

    - by JellyHead
    So the ultimate in scope-creep came in the other day: since we're using Hibernate, could we make our webapp run on Oracle as well as MySQL, interchangably? I thought this would be a simple case of changing hibernate.cfg.xml so that instead of explicity stating MySQL-specific options, it would reference a JNDI datasource, allowing the application to build regardless of the database we intend to deploy to. Then changing to a different database would simply mean changing the separate datasource configuration in JBoss, Jetty, WebLogic etc. Is this realistic? Well, I got as far as setting that up in Jetty, but What's tripping me up right now is error about the hibernate.dialect not having been set in hibernate.cfg.xml. But If I set the dialect there, then my app is still going to be built in either MySQL or Oracle flavours, which is not really what I want. Either I'm trying to attempt the impossible or I've missed something fundamentally obvious... anyone else had a similar problem (and subsequent solution/workaround)?

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  • How to partition a plane

    - by puls200
    Let's say I have a fixed number (X) of points, e.g. coordinates within a given plane (I think you can call it a 2-D point cloud). These points should be partitioned into Y polygons where Y < X. The polygons should not overlap. It would be wonderful if the polygons were konvex (like a Voronoi diagram). Imagine it like locations forming countries. For example, I have 12 points and want to create 3 polygons with 4 points each. I thought about creating a grid which covers the points. Then iterate across the points, assigning them to the closest grid cells. Maybe I miss the obvious? I am sure there are better solutions. Thanks, Daniel I just found an optimization (kmeans++) .Maybe this will yield better results..

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  • Is there a browser-agnostic way to detect client-side script errors with Watin?

    - by Michael
    We're using WatiN to test our web portals. During the course of an E2E test, we'll occasionally see client-side script errors on the IE status bar. I'd like to chain a handler onto the script error event and record the error for later analysis and bug filing. Problem is, I don't know that there's a global script error event or how to chain into it. And if there's not a browser-agnostic way to accomplish this, I can create MyIE and MyFF subclasses but then this becomes two browser-specific questions. In essence, I'm thinking of something like this entirely made-up call: browser.ScriptEngine.SetCustomErrorHandler(LogScriptingError); ... where LogScriptErrors is my code that does the obvious. Many of our client-side scripting errors don't necessarily prevent the test from continuing (a pretty UI element didn't animate, for example, but the underlying form is still submittable), so I'd like to log the error and forge ahead in most cases.

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  • How to convert .NET WPF application to Windows Forms?

    - by Janusz
    Hello, We have created a beautifully designed .NET WPF desktop application. We are installing the application with InnoSetup , and if .NET 3.5 is not present, it automatically installs it. However, the package to download .NET 3.5 is huge and we found out that about 30% of users do not finish instalation due to this. The obvious solution is to recode everything into .NET 1.1 with Windows Forms but its a major development which would take few weeks. Also, we would then face dilemma if to support both versions (and use innosetup to choose the right one) or just ditch WPF all together. Is there any easy way how to convert WPF to Windows Forms? Or do we have any alternative options to consider? Thank you!

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  • Whats the python way for recursively setting file permissions?

    - by Geoff
    What's the "python way" to recursively set the owner and group to files in a directory? I could just pass a 'chown -R' command to shell, but I feel like I'm missing something obvious. I'm mucking about with this: import os path = "/tmp/foo" for root, dirs, files in os.walk(path): for momo in dirs: os.chown(momo, 502, 20) This seems to work for setting the directory, but fails when applied to files. I suspect the files are not getting the whole path, so chown fails since it can't find the files. The error is: 'OSError: [Errno 2] No such file or directory: 'foo.html' What am I overlooking here?

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  • How can I make a core-plot graph on the phone that doesn't auto-expand to fill the whole superview

    - by Robb
    I'm pretty sure I saw an example where the graph wasn't filling the whole iPhone screen, but I can't get that to happen in my app, nor in the Core-Plot Test app from Switch On The Code. I've added a subview to the original CPLayerHostingView in the sample, then changed the classes – original back to UIView, new subview to CPLayerHostingView, and I've reconnected the File's owner's view outlet to the new subview. When I create a graph with: graph = [[CPXYGraph alloc] initWithFrame: theSubviewOutlet.bounds]; … and step through the first stages of building up the layers the bounds are accurate (i.e. the same as in the .xib) however, when all the initialization is done, and the graph shows up, it fills the whole superview. Am I missing something obvious?

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  • Managing StringBuilder Resources in C#

    - by Jim Fell
    Hello. My C# (.NET 2.0) application has a StringBuilder variable with a capacity of 2.5MB. Obviously, I do not want to copy such a large buffer to a larger buffer space every time it fills. By that point, there is so much data in the buffer anyways, removing the older data is a viable option. Can anyone see any obvious problems with how I'm doing this (i.e. am I introducing more performance problems than I'm solving), or does it look okay? tText_c = new StringBuilder(2500000, 2500000); private void AppendToText(string text) { if (tText_c.Length * 100 / tText_c.Capacity > 95) { tText_c.Remove(0, tText_c.Length / 2); } tText_c.Append(text); } Thanks.

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  • Starting out with vote_fu

    - by zizee
    Hi All, Trying my luck with the vote_fu rails plugin. The functionality looks like exactly what I need for a project of mine, but I have hit a roadblock. I have followed the github readme to the letter, installing it as a plugin. I have put acts_as_voteable on my "Event" model and acts_as_voter on my User model. In the console, when I try: >> event.votes or >> user.votes it successfully returns an empty array. but when I try to do the following: user.vote_for(event) I get "NoMethodError: undefined method `user_id' for #<Vote:0x7f5ed4355540>" Any ideas? I'm probably just missing something obvious, but maybe something is missing from the plugin's readme. Thanks.

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  • App Engine remote_api with OpenID

    - by hawkettc
    Hi, I've recently tried to switch my app engine app to using openID, but I'm having an issue authenticating with remote_api. The old authentication mechanism for remote_api doesn't seem to work (which makes sense) - I'm getting a 'urllib2.HTTPError: HTTP Error 302: Found', which I assume is appengine redirecting me to the openid login page I've set up. I guess I'm missing something fairly obvious. Currently my remote_api script has the following in it - remote_api_stub.ConfigureRemoteDatastore(app_id=app_id, path='/remote_api', auth_func=auth_func, servername=host, secure=secure) where auth_func is def auth_func(): return raw_input('Username:'), getpass.getpass('Password:') Any ideas what I need to supply to remote_api? I guess similar issues would be encountered with bulkloader too. Cheers, Colin

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  • Really basic Django E-commerce? Where do I start

    - by Andrew
    I'm trying to set up a really basic e-commerce site with Django, and am trying to figure out the best place to start. I am relatively comfortable with the framework itself, but have never done any sort of e-commerce development in any language, so I want to learn about some best practices so I don't make any huge or obvious mistakes. I've looked at Satchmo, and even went as far as installing and playing around with it, but it looks like way more than I want. I basically want to show users a list of things, and let them click a button to buy one. No cart, no shipping, just click a button, connect with Authorize.net (or something similar) to do the transaction, and then display a confirmation page. Any suggestions or online tutorials people have found helpful? Even perhaps a tutorial in another language. Or maybe a really lightweight Django plugin that doesn't try to do everything like Satchmo? I've been coming up with very little so far. Thanks!

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  • Regular expressions in a Python find-and-replace script?

    - by Haidon
    I'm new to Python scripting, so please forgive me in advance if the answer to this question seems inherently obvious. I'm trying to put together a large-scale find-and-replace script using Python. I'm using code similar to the following: findreplace = [ ('term1', 'term2'), ] inF = open(infile,'rb') s=unicode(inF.read(),charenc) inF.close() for couple in findreplace: outtext=s.replace(couple[0],couple[1]) s=outtext outF = open(outFile,'wb') outF.write(outtext.encode('utf-8')) outF.close() How would I go about having the script do a find and replace for regular expressions? Specifically, I want it to find some information (metadata) specified at the top of a text file. Eg: Title: This is the title Author: This is the author Date: This is the date and convert it into LaTeX format. Eg: \title{This is the title} \author{This is the author} \date{This is the date} Maybe I'm tackling this the wrong way. If there's a better way than regular expressions please let me know! Thanks!

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  • "Zoom" text to be as big as possible within constraints/box

    - by stolsvik
    First problem: You have 400 pixels width to go on, and need to fit some text within that constraint as large as possible (thus, the text shall use that amount of space). Throw in a new constraint: If the text is just "A", then it shall not zoom this above 100 pixels (or some specific font size). Then, a final situation: Linebreaks. Fit some text in the largest possible way within e.g. 400 x 150 pixels. An obvious way is to simply start with point 1, and then increase until you can't fit it anymore. This would work for all three problems, but would be very crude. The fitting of a single line within bounds could be done by writing it with some fixed point size, check the resulting pixel bounds of the text, and then simply scale it with a transform (the text scales properly too then, check out TransformUI). Any ideas of other ways to attack this would be greatly appreciated!

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  • vs2008 attach to process, can't see which process

    - by Mafti
    Hi, In vs2003 (and vs2005(not sure about that)) when I attached to a process, before actually attaching I could see which process were running under w3wp (I have a couple of websites running locally) so I knew which exact .net application I was about to debug. however in vs2008 the window doesn't show up anymore.. now I have to attach it, come to the conclusion it was the wrong process, stop debugging and attach it to the other process (if I haven't forgot teh processid :P ) Is there a way to "enable" that interesting window to see with .net apps are runnig in that specific w3wp process? or am i missing something obvious?

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  • Is it possible to raise an error if a variable assignment in a select returns multiple values?

    - by Brann
    I just found a bug on one of my softwares where I had forgotten a where clause. The code was something like that : declare @foo bigint declare @bar bigint select @foo = foo, @bar=bar from tbFooBar where (....a long list of condition goes there) (... and an extra condition should have went there but I forgot it) Unfortunately, the where clause I forgot was useful in very specific corner cases and the code went through testing successfully. Eventually, the query returned two values instead of one, and the resulting bug was a nightmare to track down (as it was very difficult to reproduce, and it wasn't obvious at all that this specific stored procedure was causing the issue we spotted) Debugging would have been a lot easier if the @foo=foo had raised an exception instead of silently assigning the first value out of multiple rows. Why is that this way? I can't think of a situation where one would actually want to do that without raising an error (bearing in mind the clauses 'distinct' and 'top' are there for a reason) And is there a way to make sql server 2008 raise an error if this situation occurs ?

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  • Storing API keys in Android, is obfustication enough?

    - by fredley
    I'm using the Dropbox API. In the sample app, it includes these lines: // Replace this with your consumer key and secret assigned by Dropbox. // Note that this is a really insecure way to do this, and you shouldn't // ship code which contains your key & secret in such an obvious way. // Obfuscation is good. final static private String CONSUMER_KEY = "PUT_YOUR_CONSUMER_KEY_HERE"; final static private String CONSUMER_SECRET = "PUT_YOUR_CONSUMER_SECRET_HERE"; I'm well aware of the mantra 'Secrecy is not Security', and obfuscation really only slightly increases the amount of effort required to extract the keys. I disagree with their statement 'Obfustication is good'. What should I do to protect the keys then? Is obfustication good enough, or should I consider something more elaborate?

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  • Passing JS variable from child Iframe to parent JSP on cross sub domain

    - by Tarun
    I am stuck at 1 location and need some help. I created two subdomains on apache tomcat server like domain1.localhost.com and domain2.localhost.com in server.xml. On domain1 I have a JSP that includes iFrame (hosted on domain2). How can we pass the JS variable from child Iframe to parent JSP and store it in local variable of JSP hosted on domain1.localhost.com? I tried defining document.domain = "localhost" on both JSP but didn't work. Even parent DOM window is also not available in child iFrame (on sub-domain) because of obvious cross domain policies. Any help would be highly appreciated.

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  • PHP require/include only works once in script then fails

    - by Colin
    Hi everybody, this isn't a problem as such but it's bugging me and I would appreciate any help. It might be totally obvious but I can't see it. $root_path = $_SERVER['DOCUMENT_ROOT'] require($root_path .'template/header.php') require($root_path .'template/footer.php') The script will include one or the other but not both. It will run and include the header but not the footer, if I swap them round it will load the footer first but not the header. I've tried using include instead of require but get the same result. It gives the error allow_url_include = 0. I know turning this on will solve it but my question is why is it happening? Why will it include one file but not the other? Is there any way to get them to both run without turning allow_url_include on (I'm trying to be security conscious). I have PHP 5.3 and am running WAMP. Thanks in advance for your help!

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  • How do I specify a null relation in SQLAlchemy?

    - by Jesse
    Not sure what the correct title for this question should be. I have the following schema: Matters have a one-many relationship to WorkItems. WorkItems have a one-one (or one-zero) relationship to LineItems. I am trying to create the following relation between Matters and WorkItems Matter.unbilled_work_items = orm.relation(WorkItem, primaryjoin = (Matter.id == WorkItem.matter_id) and (WorkItem.line_item_id == None), foreign_keys = [WorkItem.matter_id, WorkItem.line_item_id], viewonly=True ) This throws: AttributeError: '_Null' object has no attribute 'table' That seems to be saying that the second clause in the primaryjoin returns an object of type _Null, but it seems to be expecting something with a "table" attribute. This seems like it should be pretty straightforward to me, am I missing something obvious?

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  • Error 3032 during EF 4.0 validation

    - by Mohammadreza
    Hi guys. I have a table that has a column called "rowguid" with default value of newguid(). After I delete the generated property in the Entity Framework 4.0 designer, whenever I try to build or validate the model I receive the following error message. Error 3023: Problem in mapping fragments starting at line 1460:Column People.rowguid in table People must be mapped: It has no default value and is not nullable. It's an obvious error message but the problem is that the column HAS default value. Does anyone knows what the problem is? Thanks.

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