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  • How to use a function for every C# WinForm instead of pasting .

    - by nXqd
    protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { { if (keyData == Keys.Escape) this.Close(); return base.ProcessCmdKey(ref msg, keyData); } } I discovered this snippet to close windows form by esc. I really want to implement this to every windows form. I try to create a new abstract class which inherit from Form and another windows form will inherit from this one . But it doesn't work this way . abstract class AbsForm: Form { protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { { if (keyData == Keys.Escape) this.Close(); return base.ProcessCmdKey(ref msg, keyData); } } } public partial class HoaDonBanSach : AbsForm { public HoaDonBanSach() { InitializeComponent(); } Thanks for reading this :)

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  • smarter "reverse" of a dictionary in python (acc for some of values being the same)?

    - by mrkafk
    def revert_dict(d): rd = {} for key in d: val = d[key] if val in rd: rd[val].append(key) else: rd[val] = [key] return rd >>> revert_dict({'srvc3': '1', 'srvc2': '1', 'srvc1': '2'}) {'1': ['srvc3', 'srvc2'], '2': ['srvc1']} This obviously isn't simple exchange of keys with values: this would overwrite some values (as new keys) which is NOT what I'm after. If 2 or more values are the same for different keys, keys are supposed to be grouped in a list. The above function works, but I wonder if there is a smarter / faster way?

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  • Memcached getDelayed alternative implementation

    - by iBobo
    I would like to use getDelayed on the PHP Memcached extension but I think it's not implemented in the right way. Right now you ask for some keys and then retrieve all of them with fetch() and fetchAll(). But imagine a scenario where I need to retrieve 15 keys used in different parts of the page which I don't know in advance, but I can ask the various objects to give me the list. What I want is give the Memcached instance this list (each component would give its part) then later when I need them retrieve from the instance, but not all of them at once: each component would take the one it needs. Basically if I were to implement this I would prohibit using getDelayed alone and implement a bookGet($keys) method where you would add the keys to book (which actually calls getDelayed), and redefine get to handle these three cases: key is booked and retrieved - return the value; key is booked but not retrieved - go and force the fetch of the booked keys and return the correct value; key not booked - do a normal lookup. I want to know if this makes sense, your thoughts on the subject and if someone already implemented this or maybe PECL Memcached already works this way and actually the documentation doesn't explain it correctly.

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  • c# ProcessCmdKey overload, match generic combination

    - by leo
    Hi all, On some control, I want ProcessCmdKey to return true if the keys pressed by the user were ALT and any letter of the alphabet. I'm able to return true if the user presses Alt with the following code, but how can I add the condition of a letter also pressed ? protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if ((keyData & Keys.Alt) != 0) { return true; } } Thanks.

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  • Best way to store this data?

    - by Malfist
    I have just been assigned to renovate an old website, and I get to move it from some old archaic system to drupal. The only problem is that it's a real-estate system and a lot of data is stored. Currently all the information is stored in a single table, an id represents the house and then everything else is key/value pairs. There are a possible 243 keys per estate, there are 23840 estates in the system. As you can imagine the system is slow and difficult to query. I don't think a table with 243 rows would be a very good idea, and probably worse than the current situation. I've done some investigating and here's what I've found out: Missing data does not indicate a 0 value, data is merged from two, unique sources/formats. Some guessing is involved. I have no control over the source of the data. There are 4 keys that are common to all estates, all values look like something that is commonly searched for and could be indexed There are 10 keys that are in the [90-100)% range 8 of these are information like who's selling it, and it's address. The other two seem to belong with the below range There are 80 keys that are in the [80-90)% range This range seems to mostly just list room types and how many the house has (e.g. bedrooms_possible, bathrooms, family_room_3rd, etc) This range also includes some minor information like school districts, one or two more pieces of data on the address. The 179 keys that are in the [0-80)% range include all sorts of miscellaneous information about the estate My best idea was a hybrid approach, create a table that stores important, common information and keep a smaller key/value table. How would you store this information?

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  • Memcached: booking a fetch

    - by iBobo
    I would like to use getDelayed on the PHP Memcached extension but I think it's not implemented in the right way. Right now you ask for some keys and then retrieve all of them with fetch() and fetchAll(). But imagine a scenario where I need to retrieve 15 keys used in different parts of the page which I don't know in advance, but I can ask the various objects to give me the list. What I want is give the Memcached instance this list (each component would give its part) then later when I need them retrieve from the instance, but not all of them at once: each component would take the one it needs. Basically if I were to implement this I would prohibit using getDelayed alone and implement a bookGet($keys) method where you would add the keys to book (which actually calls getDelayed), and redefine get to handle these three cases: key is booked and retrieved - return the value; key is booked but not retrieved - go and force the fetch of the booked keys and return the correct value; key not booked - do a normal lookup. I want to know if this makes sense, your thoughts on the subject and if someone already implemented this or maybe PECL Memcached already works this way and actually the documentation doesn't explain it correctly.

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  • Multiple key presses doing different events in C#

    - by Nevik Eeirnb
    Hi, private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.W) player1.moveUp(); if (e.KeyCode == Keys.NumPad8) player2.moveUp(); } In the above code the moveUp methods basically just increment a value. I want it so both keys can be pressed (or held down)at the same time and both events will trigger. Thanks, Nevik

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  • Why do dicts of defaultdict(int)'s use so much memory? (and other simple python performance question

    - by dukhat
    import numpy as num from collections import defaultdict topKeys = range(16384) keys = range(8192) table = dict((k,defaultdict(int)) for k in topKeys) dat = num.zeros((16384,8192), dtype="int32") print "looping begins" #how much memory should this use? I think it shouldn't use more that a few #times the memory required to hold (16384*8192) int32's (512 mb), but #it uses 11 GB! for k in topKeys: for j in keys: dat[k,j] = table[k][j] print "done" What is going on here? Furthermore, this similar script takes eons to run compared to the first one, and also uses an absurd quantity of memory. topKeys = range(16384) keys = range(8192) table = [(j,0) for k in topKeys for j in keys] I guess python ints might be 64 bit ints, which would account for some of this, but do these relatively natural and simple constructions really produce such a massive overhead? I guess these scripts show that they do, so my question is: what exactly is causing the high memory usage in the first script and the long runtime and high memory usage of the second script and is there any way to avoid these costs?

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  • Denali Paging–Key seek lookups

    - by Dave Ballantyne
    In my previous post “Denali Paging – is it win.win ?” I demonstrated the use of using the Paging functionality within Denali.  On reflection,  I think i may of been a little unfair and should of continued always planned to continue my investigations to the next step. In Pauls article, he uses a combination of ctes to first scan the ordered keys which is then filtered using TOP and rownumber and then uses those keys to seek the data.  So what happens if we replace the scanning portion of the code with the denali paging functionality. Heres the original procedure,  we are going to replace the functionality of the Keys and SelectedKeys ctes : CREATE  PROCEDURE dbo.FetchPageKeySeek         @PageSize   BIGINT,         @PageNumber BIGINT AS BEGIN         -- Key-Seek algorithm         WITH    Keys         AS      (                 -- Step 1 : Number the rows from the non-clustered index                 -- Maximum number of rows = @PageNumber * @PageSize                 SELECT  TOP (@PageNumber * @PageSize)                         rn = ROW_NUMBER() OVER (ORDER BY P1.post_id ASC),                         P1.post_id                 FROM    dbo.Post P1                 ORDER   BY                         P1.post_id ASC                 ),                 SelectedKeys         AS      (                 -- Step 2 : Get the primary keys for the rows on the page we want                 -- Maximum number of rows from this stage = @PageSize                 SELECT  TOP (@PageSize)                         SK.rn,                         SK.post_id                 FROM    Keys SK                 WHERE   SK.rn > ((@PageNumber - 1) * @PageSize)                 ORDER   BY                         SK.post_id ASC                 )         SELECT  -- Step 3 : Retrieve the off-index data                 -- We will only have @PageSize rows by this stage                 SK.rn,                 P2.post_id,                 P2.thread_id,                 P2.member_id,                 P2.create_dt,                 P2.title,                 P2.body         FROM    SelectedKeys SK         JOIN    dbo.Post P2                 ON  P2.post_id = SK.post_id         ORDER   BY                 SK.post_id ASC; END; and here is the replacement procedure using paging: CREATE  PROCEDURE dbo.FetchOffsetPageKeySeek         @PageSize   BIGINT,         @PageNumber BIGINT AS BEGIN         -- Key-Seek algorithm         WITH    SelectedKeys         AS      (                 SELECT  post_id                 FROM    dbo.Post P1                 ORDER   BY post_id ASC                 OFFSET  @PageSize * (@PageNumber-1) ROWS                 FETCH NEXT @PageSize ROWS ONLY                 )         SELECT  P2.post_id,                 P2.thread_id,                 P2.member_id,                 P2.create_dt,                 P2.title,                 P2.body         FROM    SelectedKeys SK         JOIN    dbo.Post P2                 ON  P2.post_id = SK.post_id         ORDER   BY                 SK.post_id ASC; END; Notice how all i have done is replace the functionality with the Keys and SelectedKeys CTEs with the paging functionality. So , what is the comparative performance now ?. Exactly the same amount of IO and memory usage , but its now pretty obvious that in terms of CPU and overall duration we are onto a winner.    

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  • Windows Server 2008 SMTP & POP3 Configuration

    - by Alex Hope O'Connor
    This is the first time I have ever configured a VPS server without 3rd party applications such as Plesk control panel. I have got most functionality working in all my websites except I am very unsure as to how I can setup my email functionality on this new server. Basically I want the standard POP3 functionality, a bunch of accounts with private boxes, all able to send and receive emails using their individual usernames and passwords. My server setup is pretty simple, its a VPS with IIS & DNS Server running. What I have tried to do to setup SMTP & POP3 is adding the SMTP Server feature through the Server Manager Console (very unsure of the configuration as guides I found did not explain), I then installed a 3rd party application called Visdeno SMTP Extender as it claims to be a POP3 service providing accounting and the ability to communicate with email clients. That is as far as I have gotten as I can not seem to find too much information on the subject. So can someone please tell me how to go about configuring these services in order to provide standard SMTP & POP3 functionality? Thanks, Alex.

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  • Network Management Cable Labeling Techniques and their alternatives [closed]

    - by Alex
    Possible Duplicate: What is the most effective solution you used to label cables? Yes i know there are a lot of howtos and already answered questions about this topic, like this one: How do you organise the cables in your racks? Currently i am searching the web for different techniques (alternatives) for labeling the cables at the server racks and/or data centers. Unfortunately i do not have any experience with labeling/documentation of network cables in a large scale. As far as I could lookup by now the current labeling techniques are coloring and a self defined print-labeling technique (numbering, text) maybe also according to a standard which are usually used. I want to know if QR, RFID (ok RFID in a data center would be stupid due to the radio frequency wouldn't it be?), Barcodes or similar (??) have already been used by some administrators or why they did not consider such techniques at all? Too complicated (with QR scanner etc..) if you are in front of the cables and want to get quick feedback for what the cable is? What alternatives are out there? Advantages/Disadvantages? Best-Practice? I would appreciate any help on this topic, thank you! Regards, Alex

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  • How does enterprise failover, such as with google.com, actually work?

    - by Alex Regan
    We have a few fedora systems that are configured for web, FTP, and email services. We'd like to mirror these services, so that we can provide near 100% reliability for our users. I'm a fairly experienced Linux administrator, but don't have much experience with redundant systems. What is the best way to do this? How does google and amazon do it? Google.com resolves to multiple IP addresses, but if my local desktop caches one of the IPs that are unreachable, I'm going to get a failed connection message. How do they prevent that from happening? If one of their servers goes down, how is it automatically redirected to another system, without the end-user ever knowing it? I understand there are failover devices, but they're only for failing over the system itself, not a complete network. Let's say we have the worst-case scenario, such as my primary system becomes inaccessible. What are the fundamental components that are used on Linux systems to provide this capability? I'm looking for concepts, or approaches, not answers like "check out openstack". What are the actual pieces that make up the solution? What has to be done to implement this capability? Hopefully my question is clear. I'd like to know what the pieces are that make up a failover system and what approach is taken by successful organizations that implement it. Thanks again, Alex

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  • Exchange 2010 Mail Enabled Public Folder Unable to Recieve External (anon) e-mail.

    - by Alex
    Hello All, I am having issues with my "Public Folders" mail enabled folders receiving e-mails from external senders. The folder is setup with three Accepted Domains (names changed for privacy reasons): 1 - domain1.com (primary & Authoritative) 2 - domain2.com (Authoritative) 3 - domain3.com (Authoritative) When someone attempts to send an e-mail to [email protected] from inside the organization, the e-mail is received and placed in the appropriate folder. However, when someone tries to send an e-mail from outside the organization (such as a gmail account), the following error message is received: "Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 Recipient address rejected: User unknown (state 14)." When I try to send an e-mail to the same folder, using the same e-mail address above ([email protected]), but with domain2.com instead of domain3.com, it works as intended (both internal & external). I have checked, double checked, and triple checked my DNS settings comparing those from domain2 & domain3 with them both appearing identical. I have tried recreating the folders in question with the same results. I have also ran Get-PublicFolderClientPermission "\Web Programs\folder" with the following results for user anonymous: RunspaceId : 5ff99653-a8c3-4619-8eeb-abc723dc908b Identity : \Web Programs\folder User : Anonymous AccessRights : {CreateItems} Domain2.com & Domain3.com are duplicates of each other, but only domain2.com works as intended. All other exchange functions are functioning properly. If anyone out there has any suggestions, I would love to hear them. I've just hit a brick wall. Thanks for all your help in advance! --Alex

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  • Forward Apache to Django dev server

    - by Alex Jillard
    I'm trying to get apache to forward all requests on port 80 to 127.0.0.1:8000, which is where the django dev server runs. I think I have it forwarding properly, but there must be an issue with 127.0.0.1:8000 not being run by apache? I'm running the django dev server in an ubuntu vmware instance, and I'd other people in the office to see the apps in development without having to promote anything to our actual dev/staging servers. Right now the virtual machine picks up an IP for itself, and when I point a browser to that url with the defualt apache config, I get the default apache page. I've since changed the httpd.conf file to the following to try and get it to forward the requests to the django dev server: ServerName localhost <Proxy *> Order deny,allow Allow from all </Proxy> <VirtualHost *> ServerName localhost ServerAdmin [email protected] ProxyRequests off ProxyPass * http://127.0.0.1:8000 </VirtualHost> All I get are 404s with this, and in error.log I get the following (192.168.1.101 is the IP of my computer 192.168.1.142 is the IP of the virtual machine): [Mon Mar 08 08:42:30 2010] [error] [client 192.168.1.101] File does not exist: /htdocs

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  • DKIM error: dkim=neutral (bad version) header.i=

    - by GBC
    Ive been struggling the last couple of hours with setting up DKIM on my Postfix/CentOS 5.3 server. It finally sends and signs the emails, but apparently Google still does not like it. The errors I'm getting are: dkim=neutral (bad version) [email protected] from googles "show original" interface. This is what my DKIM-signature header look like: v=1; a=rsa-sha1; c=simple/simple; d=mydomain.com.au; s=default; t=1267326852; bh=0wHpkjkf7ZEiP2VZXAse+46PC1c=; h=Date:From:Message-Id:To:Subject; b=IFBaqfXmFjEojWXI/WQk4OzqglNjBWYk3jlFC8sHLLRAcADj6ScX3bzd+No7zos6i KppG9ifwYmvrudgEF+n1VviBnel7vcVT6dg5cxOTu7y31kUApR59dRU5nPR/to0E9l dXMaBoYPG8edyiM+soXo7rYNtlzk+0wd5glgFP1I= Very appreciative of any suggestions as to how I can solve this problem! Btw, here is exactly how I installed dkim-milter in CentOS 5.3 for postfix, if anyone is interested (based on this guide): mkdir dkim-milter cd dkim-milter wget http://www.topdog-software.com/oss/dkim-milter/dkim-milter-2.8.3-1.x86_64.rpm ======S====== Newest version: http://www.topdog-software.com/oss/dkim-milter/ ======E====== rpm -Uvh dkim-milter-2.8.3-1.x86_64.rpm /usr/bin/dkim-genkey -r -d mydomain.com.au ======S====== add contents of default.txt to DNS as TXT _ssp._domainkey TXT dkim=unknown _adsp._domainkey TXT dkim=unknown default._domainkey TXT v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GWETBNiQKBgQC5KT1eN2lqCRQGDX+20I4liM2mktrtjWkV6mW9WX7q46cZAYgNrus53vgfl2z1Y/95mBv6Bx9WOS56OAVBQw62+ksXPT5cRUAUN9GkENPdOoPdpvrU1KdAMW5c3zmGOvEOa4jAlB4/wYTV5RkLq/1XLxXfTKNy58v+CKETLQS/eQIDAQAB ======E====== mv default.private default mkdir /etc/mail/dkim/keys/mydomain.com.au mv default /etc/mail/dkim/keys/mydomain.com.au chmod 600 /etc/mail/dkim/keys/mydomain.com.au/default chown dkim-milt.dkim-milt /etc/mail/dkim/keys/mydomain.com.au/default vim /etc/dkim-filter.conf ======S====== ADSPDiscard yes ADSPNoSuchDomain yes AllowSHA1Only no AlwaysAddARHeader no AutoRestart yes AutoRestartRate 10/1h BaseDirectory /var/run/dkim-milter Canonicalization simple/simple Domain mydomain.com.au #add all your domains here and seperate them with comma ExternalIgnoreList /etc/mail/dkim/trusted-hosts InternalHosts /etc/mail/dkim/trusted-hosts KeyList /etc/mail/dkim/keylist LocalADSP /etc/mail/dkim/local-adsp-rules Mode sv MTA MSA On-Default reject On-BadSignature reject On-DNSError tempfail On-InternalError accept On-NoSignature accept On-Security discard PidFile /var/run/dkim-milter/dkim-milter.pid QueryCache yes RemoveOldSignatures yes Selector default SignatureAlgorithm rsa-sha1 Socket inet:20209@localhost Syslog yes SyslogSuccess yes TemporaryDirectory /var/tmp UMask 022 UserID dkim-milt:dkim-milt X-Header yes ======E====== vim /etc/mail/dkim/keylist ======S====== *@mydomain.com.au:mydomain.com.au:/etc/mail/dkim/keys/mydomain.com.au/default ======E====== vim /etc/postfix/main.cf ======S====== Add: smtpd_milters = inet:localhost:20209 non_smtpd_milters = inet:localhost:20209 milter_protocol = 2 milter_default_action = accept ======E====== vim /etc/mail/dkim/trusted-hosts ======S====== localhost 127.0.0.1 ======E====== /etc/mail/local-host-names ======S====== localhost 127.0.0.1 ======E====== /sbin/chkconfig dkim-milter on /etc/init.d/dkim-milter start /etc/init.d/postfix restart

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  • How do I add a toolbar to a region with ExtJS

    - by gargantaun
    I have a border layout in ExtJS, The north region contains some HTML, but also needs to contain a toolbar like this... So i've managed to get the border layout set up, added the html to the North Region of the layout, but I can't find any workable examples of how to implement a tool bar. I have found lot's of examples of toolbars on their own, but I've not got the luxury or learning ExtJs thoroughly so it's all greek to me. I suspect there's a way to define a tool bar outside of the cumbersome JSON style flow of creating a layout and somehow attaching it to the region, and I'm hoping it's relativley simple to do. If someone can explain how I'd do this, it would really help. Here's the code so far... //make sure YOUR path is correct to this image!! Ext.BLANK_IMAGE_URL = '../../ext-2.0.2/resources/images/default/s.gif'; //this runs on DOM load - you can access all the good stuff now. Ext.onReady(function(){ var viewport = new Ext.Viewport({ layout: "border", border: false, renderTo: Ext.getBody(), items: [ // ------------------------------------------------------------------ { region: "north", id : "toolbar-area", xtype: 'panel', html: [ "<div id=\"html-header\">", "<div id=\"council-logo\"></div>", "<ul id=\"ancillary-menu\">", "<li><a href=\"#\">Logout</a></li>", "<li><a href=\"#\">Gazeteer Home</a></li>", "<li>Hello Rachel</li>", "</ul>", "<img id=\"inteligent-logo\" src=\"applied-images/logos/inteligent.gif\">", "</div>" ], /* ++++++++++++++++++++++++++++++++++++++++++++ */ /* The toolbar needs to go around here.... */ /* ++++++++++++++++++++++++++++++++++++++++++++ */ height: 100 }, // ------------------------------------------------------------------ // WEST // ------------------------------------------------------------------ { region: 'west', xtype: 'panel', split: true, resizeable: false, maxWidth : 350, minWidth : 349, collapsible: true, title: 'Gazetteer Explorer', width: 350, minSize: 150, // -------------------------------------------------------------- title: 'Nested Layout', layout: 'border', border: false, id: "west", items: [ { // *********************************************** // Search Form // *********************************************** region : "north", height: 300, split : true, id : "left-form-panel", items : [{ xtype : "form", id : "search-form", items : [ // Authority combo box // =============================== { xtype : "combo", fieldLabel : "Authority", name : "authority", hiddenName : "authority", id : "authority-combo" }, // =============================== // Search Fieldset // =============================== { xtype : "fieldset", autoHeight : true, title : "Search by...", id : "search-fieldset", items : [ // Ref Number text Box // %%%%%%%%%%%%%%%% { xtype : "textfield", name : "ref-number", fieldLabel : "Ref. Number", id : "ref-number-textfield" }, // %%%%%%%%%%%%%%%% // Streetname Combo // %%%%%%%%%%%%%%% { xtype : "combo", name : "street-name", hiddenName : "street-name", fieldLabel : "Street Name", id : "street-name-combo" }, // %%%%%%%%%%%%%%%% // Postcode Combo // %%%%%%%%%%%%%%%% { xtype : "combo", name : "postcode", hiddenName : "postcode", fieldLabel : "Postcode", id : "postcode-combo" }, // %%%%%%%%%%%%%%%% // Postcode Combo // %%%%%%%%%%%%%%%% { xtype : "combo", name : "town", hiddenName : "town", fieldLabel : "Town", id : "towm-combo" }, // %%%%%%%%%%%%%%%% // Postcode Combo // %%%%%%%%%%%%%%%% { xtype : "combo", name : "locality", hiddenName : "locality", fieldLabel : "Locality", id : "locality-combo" }, // %%%%%%%%%%%%%%% // Search Button // %%%%%%%%%%%%%%%% { xtype : "button", text : "Search", id : "search-button" }, // Reset Button // %%%%%%%%%%%%%%% { xtype : "button", text : "Reset", id : "reset-button" } ] }, // ======================= ] }] // ********************************************* }, { region: 'center', html: 'Tree view goes here' } ] }, // ------------------------------------------------------------------ { region: 'center', xtype: 'panel', // -------------------------------------------------------------- layout: 'border', border: false, items: [ { region: 'center', height: 200, split: true, html: 'Map goes here' }, { region: 'south', title: "Selection", split: true, height: 200, collapsible: true, html: 'Nested Center' } ] }, // ------------------------------------------------------------------ { region: 'east', }, // ------------------------------------------------------------------ { region: 'south', }] }); }); Sorry there's so much code, but ExtJS makes me scared to touch anything that's working.

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  • Odd behavior in Django Form (readonly field/widget)

    - by jamida
    I'm having a problem with a test app I'm writing to verify some Django functionality. The test app is a small "grade book" application that is currently using Alex Gaynor's readonly field functionality http://lazypython.blogspot.com/2008/12/building-read-only-field-in-django.html There are 2 problems which may be related. First, when I flop the comment on these 2 lines below: # myform = GradeForm(data=request.POST, instance=mygrade) myform = GradeROForm(data=request.POST, instance=mygrade) it works like I expect, except of course that the student field is changeable. When the comments are the shown way, the "studentId" field is displayed as a number (not the name, problem 1) and when I hit submit I get an error saying that studentId needs to be a Student instance. I'm at a loss as to how to fix this. I'm not wedded to Alex Gaynor's code. ANY code will work. I'm relatively new to both Python and Django, so the hints I've seen on websites that say "making a read-only field is easy" are still beyond me. // models.py class Student(models.Model): name = models.CharField(max_length=50) parent = models.CharField(max_length=50) def __unicode__(self): return self.name class Grade(models.Model): studentId = models.ForeignKey(Student) finalGrade = models.CharField(max_length=3) # testbed.grades.readonly is alex gaynor's code from testbed.grades.readonly import ReadOnlyField class GradeROForm(ModelForm): studentId = ReadOnlyField() class Meta: model=Grade class GradeForm(ModelForm): class Meta: model=Grade // views.py def modifyGrade(request,student): student = Student.objects.get(name=student) mygrade = Grade.objects.get(studentId=student) if request.method == "POST": # myform = GradeForm(data=request.POST, instance=mygrade) myform = GradeROForm(data=request.POST, instance=mygrade) if myform.is_valid(): grade = myform.save() info = "successfully updated %s" % grade.studentId else: # myform=GradeForm(instance=mygrade) myform=GradeROForm(instance=mygrade) return render_to_response('grades/modifyGrade.html',locals()) // template <p>{{ info }}</p> <form method="POST" action=""> <table> {{ myform.as_table }} </table> <input type="submit" value="Submit"> </form> // Alex Gaynor's code from django import forms from django.utils.html import escape from django.utils.safestring import mark_safe from django.forms.util import flatatt class ReadOnlyWidget(forms.Widget): def render(self, name, value, attrs): final_attrs = self.build_attrs(attrs, name=name) if hasattr(self, 'initial'): value = self.initial return mark_safe("<span %s>%s</span>" % (flatatt(final_attrs), escape(value) or '')) def _has_changed(self, initial, data): return False class ReadOnlyField(forms.FileField): widget = ReadOnlyWidget def __init__(self, widget=None, label=None, initial=None, help_text=None): forms.Field.__init__(self, label=label, initial=initial, help_text=help_text, widget=widget) def clean(self, value, initial): self.widget.initial = initial return initial

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  • Searches (and general querying) with HBase and/or Cassandra (best practices?)

    - by alexeypro
    I have User model object with quite few fields (properties, if you wish) in it. Say "firstname", "lastname", "city" and "year-of-birth". Each user also gets "unique id". I want to be able to search by them. How do I do that properly? How to do that at all? My understanding (will work for pretty much any key-value storage -- first goes key, then value) u:123456789 = serialized_json_object ("u" as a simple prefix for user's keys, 123456789 is "unique id"). Now, thinking that I want to be able to search by firstname and lastname, I can save in: f:Steve = u:384734807,u:2398248764,u:23276263 f:Alex = u:12324355,u:121324334 so key is "f" - which is prefix for firstnames, and "Steve" is actual firstname. For "u:Steve" we save as value all user id's who are "Steve's". That makes every search very-very easy. Querying by few fields (properties) -- say by firstname (i.e. "Steve") and lastname (i.e. "l:Anything") is still easy - first get list of user ids from "f:Steve", then list from "l:Anything", find crossing user ids, an here you go. Problems (and there are quite a few): Saving, updating, deleting user is a pain. It has to be atomic and consistent operation. Also, if we have size of value limited to some value - then we are in (potential) trouble. And really not of an answer here. Only zipping the list of user ids? Not too cool, though. What id we want to add new field to search by. Eventually. Say by "city". We certainly can do the same way "c:Los Angeles" = ..., "c:Chicago" = ..., but if we didn't foresee all those "search choices" from the very beginning, then we will have to be able to create some night job or something to go by all existing User records and update those "c:CITY" for them... Quite a big job! Problems with locking. User "u:123" updates his name "Alex", and user "u:456" updates his name "Alex". They both have to update "f:Alex" with their id's. That means either we get into overwriting problem, or one update will wait for another (and imaging if there are many of them?!). What's the best way of doing that? Keeping in mind that I want to search by many fields? P.S. Please, the question is about HBase/Cassandra/NoSQL/Key-Value storages. Please please - no advices to use MySQL and "read about" SELECTs; and worry about scaling problems "later". There is a reason why I asked MY question exactly the way I did. :-)

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  • Choosing the default value of an Enum type without having to change values

    - by frou
    In C#, is it possible to decorate an Enum type with an attribute or do something else to specify what the default value should be, without having the change the values? The numbers required might be set in stone for whatever reason, and it'd be handy to still have control over the default. enum Orientation { None = -1, North = 0, East = 1, South = 2, West = 3 } Orientation o; // Is 'North' by default.

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  • MS-ACCESS query to match first few characters in string comparision

    - by neobee
    What query is suitable to compare two tables specied below, however only part of string in location(table1) will matches with the Location(table2). Location(table1) Location(table2) india- north USxcs India-west Indiaasd India- east Indiaavvds India- south Africassdcasv US- north Africavasvdsa us-west UKsacvavsdv uk- east Indiacascsa uk- south UScssca Africa-middle Indiacsasca Africa-south Africaccc Africa-east UKcac only 1st two characters of location(table1) and 1st two characters of location(table2) should match. Please help only any four characters of location(table1)and any two characters of location(table2)should match.

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  • Google Place API marker issue

    - by user2959740
    I am creating itinerary planner like http://www.plnnr.com I want to create Google Place marker by direction(North,East,west,south) for e.g. When people select 4 day it should show attraction for 1st day all north location 2nd day east location then south and west. How to i do the auto marker. I am not sure how plnnr.com works how they are generating the lines based on direction. Please anyone help me on this.

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  • How to maintain decimal percision in calculations

    - by Blankman
    I need to sum 2 decimal values together, then divide by 2 and convert to string. My calculation currently is trimming to 2 decimal places, but I want to keep as many decimals as I can. city.Latitude = ( (lat.North + lat.South) / 2 ).ToString(); the values for lat.North and lat.Souch are like: 55.32342322

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  • How to maintain decimal precision in calculations

    - by Blankman
    I need to sum 2 decimal values together, then divide by 2 and convert to string. My calculation currently is trimming to 2 decimal places, but I want to keep as many decimals as I can. city.Latitude = ( (lat.North + lat.South) / 2 ).ToString(); the values for lat.North and lat.Souch are like: 55.32342322

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  • CTE Join query issues

    - by Lee_McIntosh
    Hi everyone, this problem has me head going round in circles at the moment and i wondering if anyone could give any pointers as to where im going wrong. Im trying to produce a SPROC that produces a dataset to be called by SSRS for graphs spanning the last 6 months. The data for example purposes uses three tables (theres more but the it wont change the issue at hand) and are as follows: tbl_ReportList: Report Site ---------------- North abc North def East bbb East ccc East ddd South poa South pob South poc South pod West xyz tbl_TicketsRaisedThisMonth: Date Site Type NoOfTickets --------------------------------------------------------- 2010-07-01 00:00:00.000 abc Support 101 2010-07-01 00:00:00.000 abc Complaint 21 2010-07-01 00:00:00.000 def Support 6 ... 2010-12-01 00:00:00.000 abc Support 93 2010-12-01 00:00:00.000 xyz Support 5 tbl_FeedBackRequests: Date Site NoOfFeedBackR ---------------------------------------------------------------- 2010-07-01 00:00:00.000 abc 101 2010-07-01 00:00:00.000 def 11 ... 2010-12-01 00:00:00.000 abc 63 2010-12-01 00:00:00.000 xyz 4 I'm using CTE's to simplify the code, which is as follows: DECLARE @ReportName VarChar(200) SET @ReportName = 'North'; WITH TicketsRaisedThisMonth AS ( SELECT [Date], Site, SUM(NoOfTickets) AS NoOfTickets FROM tbl_TicketsRaisedThisMonth WHERE [Date] >= DATEADD(mm, DATEDIFF(m,0,GETDATE())-6,0) GROUP BY [Date], Site ), FeedBackRequests AS ( SELECT [Date], Site, SUM(NoOfFeedBackR) AS NoOfFeedBackR FROM tbl_FeedBackRequests WHERE [Date] >= DATEADD(mm, DATEDIFF(m,0,GETDATE())-6,0) GROUP BY [Date], Site ), SELECT trtm.[Date] SUM(trtm.NoOfTickets) AS NoOfTickets, SUM(fbr.NoOfFeedBackR) AS NoOfFeedBackR, FROM Reports rpts LEFT OUTER JOIN TotalIncidentsDuringMonth trtm ON rpts.Site = trtm.Site LEFT OUTER JOIN LoggedComplaints fbr ON rpts.Site = fbr.Site WHERE rpts.report = @ReportName GROUP BY trtm.[Date] And the output when the sproc is pass a parameter such as 'North' to be as follows: Date NoOfTickets NoOfFeedBackR ----------------------------------------------------------------------------------- 2010-07-01 00:00:00.000 128 112 2010-08-01 00:00:00.000 <data for that month> <data for that month> 2010-09-01 00:00:00.000 <data for that month> <data for that month> 2010-10-01 00:00:00.000 <data for that month> <data for that month> 2010-11-01 00:00:00.000 <data for that month> <data for that month> 2010-12-01 00:00:00.000 122 63 The issue I'm having is that when i execute the query I'm given a repeated list of values of each month, such as 128 will repeat 6 times then another value for the next months value repeated 6 times, etc. argh!

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