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  • Django Custom Field: Only run to_python() on values from DB?

    - by Adam Levy
    How can I ensure that my custom field's *to_python()* method is only called when the data in the field has been loaded from the DB? I'm trying to use a Custom Field to handle the Base64 Encoding/Decoding of a single model property. Everything appeared to be working correctly until I instantiated a new instance of the model and set this property with its plaintext value...at that point, Django tried to decode the field but failed because it was plaintext. The allure of the Custom Field implementation was that I thought I could handle 100% of the encoding/decoding logic there, so that no other part of my code ever needed to know about it. What am I doing wrong? (NOTE: This is just an example to illustrate my problem, I don't need advice on how I should or should not be using Base64 Encoding) def encode(value): return base64.b64encode(value) def decode(value): return base64.b64decode(value) class EncodedField(models.CharField): __metaclass__ = models.SubfieldBase def __init__(self, max_length, *args, **kwargs): super(EncodedField, self).__init__(*args, **kwargs) def get_prep_value(self, value): return encode(value) def to_python(self, value): return decode(value) class Person(models.Model): internal_id = EncodedField(max_length=32) ...and it breaks when I do this in the interactive shell. Why is it calling to_python() here? >>> from myapp.models import * >>> Person(internal_id="foo") Traceback (most recent call last): File "<console>", line 1, in <module> File "/usr/local/lib/python2.6/dist-packages/django/db/models/base.py", line 330, in __init__ setattr(self, field.attname, val) File "/usr/local/lib/python2.6/dist-packages/django/db/models/fields/subclassing.py", line 98, in __set__ obj.__dict__[self.field.name] = self.field.to_python(value) File "../myapp/models.py", line 87, in to_python return decode(value) File "../myapp/models.py", line 74, in decode return base64.b64decode(value) File "/usr/lib/python2.6/base64.py", line 76, in b64decode raise TypeError(msg) TypeError: Incorrect padding I had expected I would be able to do something like this... >>> from myapp.models import * >>> obj = Person(internal_id="foo") >>> obj.internal_id 'foo' >>> obj.save() >>> newObj = Person.objects.get(internal_id="foo") >>> newObj.internal_id 'foo' >>> newObj.internal_id = "bar" >>> newObj.internal_id 'bar' >>> newObj.save() ...what am I doing wrong?

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  • Building html structure in php or javascript?

    - by Adam
    I've been doing a lot of ajax calls and using the returned data to build html with javascript. However, I've noticed some people are returning the constructed html in the ajax calls since they're doing it all in php. What is the preferred method? I have a bunch of stuff already using javascript, so I guess I would prefer not changing everything to use just php. But, I'm assuming php would be more "secure."? The following is what I've been doing: $main_frag = $("<div class='order-container'/>"); $contact_frag = $("<div class='group'><div class='line-data'>Name: "+data.name+"</div><div class='line-data'>Email: "+data.email+"</div><div class='line-data'>Phone: "+data.phone+"</div></div>"); $address_frag = $("<div class='group'><div class='line-data'>Address 1: "+data.address_one+"</div><div class='line-data'>Address 2: "+address2+"</div><div class='line-data'>City: "+data.city+"</div><div class='line-data'>Province: "+data.province+"</div><div class='line-data'>Postal Code: "+data.postal+"</div></div>"); etc.. I just want to hear the opinions of the community.

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  • object consisting of jQuery element

    - by Adam Kiss
    hello, current code I've built function to do something over collection of jQuery elements: var collection = $([]); //empty collection I add them with: collection = collection.add(e); and remove with: collection = collection.not(e); It's pretty straightforward solution, works nicely. problem Now, I would like to have an object consisting of various settings set to any jQuery element, i.e.: function addObject(e){ var o = { alpha: .6 //float base: {r: 255, g: 255, b: 255} //color object } e.data('settings', o); } But when I pass jQuery object/element to function (i.e. as e), calling e.data doesn't work, although it would be simplest and really nice solution. question If I have an "collection" of jQuery elements, what is the simplest way of storing some data for each element of set?

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  • Best practices for storing & selecting time/date with php & mysql?

    - by Adam
    I often find myself storing data in a mysql database, and then wanting to display all sorts of stats about my data, specifically stuff like 'how many rows do I have for this date, or that date'. Does anyone know of (or could write) a good tutorial on this subject? Ideally a good tutorial would overview: Best practices when storing the data (i.e. what formats to use, how to use them servertime vs. generated time, etc.) Best practices when selecting data from the database with php (i.e. how to sort rows by date, how to retrieve only rows from a certain date, or a certain hour, etc).. Timezones and other issues that might come up. Thanks in advance.

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  • How do I use jquery to both download & delete files dynamically from servlet

    - by Adam
    Is it possible to a jquery $.get() to call a servlet and use it to both download a file or update the page without reloading the page? (Or more basically, can I download a file without reloading the page?) For example, I am using a servlet that either returns a file to download of mimetype "application/octet-stream", or returns text to be update in the page of type "text/html". I can write a form with a submit, but then it reloads the page, so I've been trying to use $.get()... but the download doesn't work. <script type="text/javascript"> jQuery(document).ready(function(){ $("#handleFileOptions button").button(); }); function handleFilesSubmit(requestType) { $.get('FileServlet', {filename: $('#radioFileList input:radio:checked').button("widget").text(), requestType: requestType}, function(data){ ...?... }); } </script> In the html: <div id = "handleFiles"> <div id ="radioFileList"> <div id="radioFileList"> <input value="file0.txt" type="radio" id="fileitem0><label for="fileitem0">file0.txt</label> <input value="file1.txt" type="radio" id="fileitem1><label for="fileitem0">file1.txt</label> </div> </div> <div id="handleFileOptions"> <button id="handleFileOption0" onclick="handleFilesSubmit('Download')">Download</button> <button id="handleFileOption1" onclick="handleFilesSubmit('Delete')">Delete</button> </div> </div>

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  • my div tag is not aligning properly after jquery.html replacement

    - by Adam
    <div class="container"><span class="field_label">Job</span><input class="fields2" type="text" maxlength="200" name="first_name" /></div> <div class="container"><span class="field_label">Date</span><input class="fields2" type="text" maxlength="200" name="the_date" id="the_date" /></div> <div class="container" id="sched_text">sdfdsfdsf</div> <!-- schedule text--> <div class="container"><span class="field_label">Time</span> .container{ position:relative; display:block; float:right; border: 1px solid; padding-bottom: 10px; } my html/css here has my containers aligning right below each other. However, when I use .html in jquery to change or add text to sched_text it throws the css off and places the div tag not as a block anymore but placed somewhere to the side. Does something change when you use .html text? what would the proper way of doing it? Thanks Ok the issue is that my .html or .text is not a string. I just did .text(the_Week[i][1]); which results in a number. How do I present it as a string?

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  • JSON to display text -- Freezes UI

    - by Adam Storr
    Hi everyone, I currently have a very simple view which displays info from a JSON feed. The problem I'm facing is the few second pause I encounter once I press this tab. How can I make this view load instantly and then have the label.text areas load after? Preferable with an activity indicator? Should I use threads? Thanks in advance! Code: - (NSString *)stringWithUrl:(NSURL *)url { NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadRevalidatingCacheData timeoutInterval:30]; NSData *urlData; NSURLResponse *response; NSError *error; urlData = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:&response error:&error]; return [[NSString alloc] initWithData:urlData encoding:NSUTF8StringEncoding]; } - (id)objectWithUrl:(NSURL *)url { SBJsonParser *jsonParser = [SBJsonParser new]; NSString *jsonString = [self stringWithUrl:url]; return [jsonParser objectWithString:jsonString error:NULL]; } - (NSDictionary *)downloadStats { id response = [self objectWithUrl:[NSURL URLWithString:@"http://www.example.com/JSON"]]; NSDictionary *feed = (NSDictionary *)response; return feed; [feed release]; } - (void)viewDidLoad { [super viewDidLoad]; [GlobalStatsScrollView setScrollEnabled:YES]; [GlobalStatsScrollView setContentSize:CGSizeMake(320, 360)]; } - (void)viewWillAppear:(BOOL)animated { NSLog(@"View appears"); // Download JSON Feed NSDictionary *feed = [self downloadStats]; totalproduced.text = [feed valueForKey:@"Produced"]; totalno.text = [feed valueForKey:@"Total"]; mostcommon.text = [feed valueForKey:@"Most Common"]; }

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  • replay in django + apcahce + mod_wsgi ??

    - by Adam
    I have a simple django page that has a counter on it. I use Apache2 and mod_wsgi to serve it. First, when I enter this page, the counter shows 0, as it should. The second time when I enter the page the counter shows 1 - again, it is the right behavior. The problem begins now, cause when I enter this page the third time, I get 0 again. When I refresh it goes between 0, and 1, clearly using some cache or so. If I wait for some time and then try again, it will show 2, and 3, but will be stuck with those values, till this cache or whatever it is will be flushed, and then the counter continues. Does somebody knows how I can get it work right (the real scenario deals with getting data from the DB, but the problems with this strange cache are the same). BTW, I don't have any caching engine set in my django settings.

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  • How can I extract a range of lines from a text file on unix?

    - by Adam J. Forster
    I have a ~23000 line sql dump containing several databases worth of data. I need to extract a certain section of this file (i.e. the data for a single database) and place it in a new file. I know both the start and end line numbers of the data that I want. Does anyone know a unix command (or series of commands) to extract all lines from a file between say line 16224 and 16482 and then redirect them into a new file?

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  • Is there a way to update a database when installing/upgrading an app?

    - by Adam
    I have a main application, and a bunch of sub-applications (they are separate apps, which do not appear on the android home dashboard). I was planning on having a SQLite DB which the main app maintains, and get a list of available sub-apps from. Is there a way to update this main database as the user installs the sub-apps? Two alternative I was thinking of include: User installs the sub-apps via the main app, which would then update the DB. Rather than use the DB to find all installed sub-apps, have each sub-app declare a category, and use intents to query for all applications which match that query (is this even possible? if so, advice is welcomed). Thanks!

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  • need help understanding a function.

    - by Adam McC
    i had previously asked for help writing/improving a function that i need to calculate a premium based on differing values for each month. the premium is split in to 12 months and earned on a percentage for each month. so if the policy start in march and we are in jan we will have earned 10 months worth. so i need to add up the monthly earning to give us the total earned. wach company wil have differeing earnings values for each month. my original code is Here. its ghastly and slow hence the request for help. and i was presented with the following code. the code works but returns stupendously large figures. begin set @begin=datepart(month,@outdate) set @end=datepart(month,@experiencedate) ;with a as ( select *, case calmonth when 'january' then 1 when 'february' then 2 when 'march' then 3 when 'april' then 4 when 'may' then 5 when 'june' then 6 when 'july' then 7 when 'august' then 8 when 'september' then 9 when 'october' then 10 when 'november' then 11 when 'december' then 12 end as Mnth from tblearningpatterns where clientname=@client and earningpattern=@pattern ) , b as ( select earningvalue, Mnth, earningvalue as Ttl from a where Mnth=@begin union all select a.earningvalue, a.Mnth, cast(b.Ttl*a.earningvalue as decimal(15,3)) as Ttl from a inner join b on a.Mnth=b.Mnth+1 where a.Mnth<=@end ) select @earningvalue= Ttl from b inner join ( select max(Mnth) as Mnth from b ) c on b.Mnth=c.Mnth option(maxrecursion 12) SET @earnedpremium = @earningvalue*@premium end can someone please help me out?

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  • WebView load javascript on the fly

    - by ADAM
    I have the following code which loads and html file into a webview - (void)awakeFromNib{ NSString *resourcesPath = [[NSBundle mainBundle] resourcePath]; NSString *htmlPath = [resourcesPath stringByAppendingString:@"/main.html"]; [[self mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:htmlPath]]]; } How would i dynamically load a css file (in the most efficient manner) as it does not suit to have the css file link in the html file

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  • Left Join only returning one row

    - by Adam
    I am trying to join two tables. I would like all the columns from the product_category table (there are a total of 6 now) and count the number of products, CatCount, that are in each category from the products_has_product_category table. My query result is 1 row with the first category and a total count of 68, when I am looking for 6 rows with each individual category's count. <?php $result = mysql_query(" SELECT a.*, COUNT(b.category_id) AS CatCount FROM `product_category` a LEFT JOIN `products_has_product_category` b ON a.product_category_id = b.category_id "); while($row = mysql_fetch_array($result)) { echo ' <li class="ui-shadow" data-count-theme="d"> <a href="' . $row['product_category_ref_page'] . '.php" data-icon="arrow-r" data-iconpos="right">' . $row['product_category_name'] . '</a><span class="ui-li-count">' . $row['CatCount'] . '</span></li>'; } ?> I have been working on this for a couple of hours and would really appreciate any help on what I am doing wrong.

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  • Is there a way to have element behind a div (links) clickable in areas where the div is "transparent

    - by Adam
    I have a block element that is positioned absolutely and some other elements on page that are positioned fixed. The effect is the block on top floats over the page which works well. The links in the elements at the bottom underneath are not clickable. They shouldn't be when the content of the div is over them, but when the "marginal" areas which are transparent are over the links they are visible, but clicks only register to the covering div. The problem only happens when the padding covers the div. But if I just rely on the margin the bottom margin is ignored by browser so the scroll doesn't go high enough up. To solve this I resort to padding at the bottom. This is the problem. Is there a clean way around this? I realize I could have the underneath elements doubled and place on top, but opacity set to 0. That is an undesirable solution however. Sample of the problem: <!DOCTYPE html> <html lang='en' xml:lang='en' xmlns='http://www.w3.org/1999/xhtml'> <head> <style> #top, #bottom { position: fixed; border: 1 px solid #333; background-color: #eee; left: 100px; padding: 8px; } #top { top: 0; z-index: 1; } #bottom { bottom: 0; z-index: 2; } #contentWrapper { position: absolute; margin: 100px 0 0 0; /* Padding is used to make sure the scroll goes up further on the page */ padding: 0 0 100px 0; width: 600px; z-index: 3; } #content { border: 1 px solid #333; background-color: #eee; height: 1000px; } </style> </head> <body> <div id='top'><a href="#">Top link</a></div> <div id='bottom'><a href="#">Bottom link</a></div> <div id='contentWrapper'> <div id='content'>Some content</div> </div> </body> </html>

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  • Rails and a development domain

    - by Adam
    I'm trying to use http://ls1.bigseapreview.com as a domain for a Rails project. The problem is it doesn't seem to be correctly mapping any routing apart from the home page. I have added /about but you can see that you will just get a 404, but it works locally. What do I have to do to fix this?

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  • Regular Expression to match a string

    - by Adam Witko
    Hi, I've got two possible string inputs that my application will receive, and if it matches the following two strings, I need it regex.ismatch() to return true: "User * has logged out" "User * has joined" I'm not that good at regex and just can't figure out how to go about matching the above. Any help would be great!!!

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  • localhost/live - detect by HTTP_HOST

    - by Adam Kiss
    Hello, let's say I develop locally and debug small things on live server. Is it good idea to have something like this in my code? : $is_local = (strpos($_SERVER['http_host'], 'localhost') !== false); define ('DEBUG',$is_local); And then use it through my code, when setting stuff? $mysql_settings = (DEBUG) ? array(/*localhost settings*/) : array(/*live settings*/); This way, I can use the same files live and on localhost, so I can sync without any fear of having wrong e.g. connection settings on live server. Is it good or wrong idea?

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  • Footprint of Lua on a PPC Micro

    - by Adam Shiemke
    We're developing some code on Freescale PPC micros (5517 and 5668 at the moment), and I was wondering if we could put Lua on them. The devices need to be easily programmed/reconfigured in the field, and the current product uses a proprietary interpreted logic language that can be loaded in, and our software (written in C) runs an interpreter. I would like to move to a better language (the implementation is a bit buggy and slow), so I'm considering Lua, but the memory footprint must be very low. For the 5517 (which we may not use), the maximum RAM is 80K. Things are better on the 5668, with 592K of RAM. So does anyone know if I can put Lua on bare metal? We're effectively not running an OS. If so, are there any estimates on what kind of memory footprint we might see? How much effort it would take? Failing this, does anyone know of any kind of interpreter that might be better in a memory-constrained environment without an OS? Or are we better just rolling our own?

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  • Audible Audio (.aa) file spec?

    - by Adam
    Does anyone know of a good resource on the Audible Audio (.aa) file spec? I'm trying to write a program that can use them, if no one knows of a resource, any tips on reverse engineering the spec my self? I opened it up in a Hex editor and poked around, looks like an MP3 but with a ton more header info.

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