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Calling a function from a ajax response content

- by pistolshrimp

Hi guys. I have a function when the page is ready. <script> $(function(){ function do_ajax(){ do some stuff } });.... This works great on that page. Then I make a .post call and load the response into a div. The response has a <script>$(selector).click(function(){ do_ajax(); });</script> with the result. I get an error "do_ajax() is undefined". How can I call do_ajax() from an event from the ajax content? Another one. I am using jquery ui datepicker. So, when the page is loaded, I invoke the $(".datepicker").datepicker(); This works great on that page. Then I make a .post call and load the response into a div. The response has a couple of .datepicker fields. The problem is that the newly loaded datepicker fields don't get the calendar unless I return <script>$(".datepicker").datepicker();</script> with the result. Is that how you guys do it or is there another way? Thanks!

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ajax panel update during the middle of a function C# ASP.net site

- by user2615302

ajax panel update during the middle of a function C# ASP.net site This is the button click. I would like to update LbError.Text to "" before the rest of the function continues. This is my current code. protected void BUpload_Click(object sender, EventArgs e) { LbError.Text = ""; UpdatePanel1.Update(); //// need it to update here before it moves on but it waits till the end to update the lablel Exicute functions..... ....... ....... } <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"> <contenttemplate> <asp:Label ID="LbError" runat="server" CssClass="failureNotification" Text=""></asp:Label> <br /><br /> <br /><br /> <asp:TextBox ID="NewData" runat="server"></asp:TextBox><br /> then click <asp:Button ID="BUpload" runat="server" Text="Upload New Data" onclick="BUpload_Click"/><br /> Things i have tried include have another UpdatePanel just and same results. any help would be greatly appreciated.

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How to get jquery to append output immediately after each ajax call in a loop

- by david_nash

I'd like to append to an element and have it update immediately. console.log() shows the data as expected but append() does nothing until the for loop has finished and then writes it all at once. index.html: ... <body> <p>Page loaded.</p> <p>Data:</p> <div id="Data"></div> </body> test.js: $(document).ready(function() { for( var i=0; i<5; i++ ) { $.ajax({ async: false, url: 'server.php', success: function(r) { console.log(r); //this works $('#Data').append(r); //this happens all at once } }); } }); server.php: <?php sleep(1); echo time()."<br />"; ?> The page doesn't even render until after the for loop is complete. Shouldn't it at least render the HTML first before running the javascript?

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Is windows a "second class citizen" in the django community?

- by Daniel Upton

I'm currently doing R&D for a web application which we plan to host ourselves initially and then allow customers to self host. My task has been evaluating web frameworks to see which would give us the biggest productivity initially and ease of maintence while also allowing us to easily support deployment to customer controlled environments. Our team has experience with ASP.NET (MVC and Webforms) and Ruby on Rails. Our experience with rails is that windows deployment is a very taboo subject and any questions on IRC or SO are met with knee jerk "why not linux" responses.. However in this case our target market may be running windows or linux servers. Is this also the case in django land? Is it possible with rubbish performance? Is it possible with lost of pain? Is it seen as reasonable and not treated as a completely stupid idea for not wanting to run linux?

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RadControls for ASP.NET AJAX Q1 2010 release is out

The new major Q1 2010 release of RadControls for ASP.NET AJAX has just been uploaded on telerik.com. I know that there are many people who would like to download and try out the new controls/features in the release without any further delay, that is why I will spare you the details for now and will let you enjoy it at your own disposal :) The links below will direct you to the main resources that highlight the important parts you would like to take a look at: What's new:http://www.telerik.com/products/aspnet-ajax/whats-new.aspx Release notes:http://www.telerik.com/products/aspnet-ajax/whats-new/release-history/q1-2010-version-2010-1-309.aspx Demos:http://demos.telerik.com/aspnet-ajax/controls/examples/default/defaultcs.aspx Documentation:http://www.telerik.com/help/aspnet-ajax/introduction.htmlDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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.NET Winform AJAX Login Services

- by AdamSane

I am working on a Windows Form that connects to a ASP.NET membership database and I am trying to use the AJAX Login Service. No matter what I do I keep on getting 404 errors on the Authentication_JSON_AppService.axd call. Web Config Below <?xml version="1.0"?>  <configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <connectionStrings  /> <appSettings/> <system.web>  <compilation debug="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> </assemblies> </compilation> <membership defaultProvider="dbSqlMembershipProvider"> <providers> <add name="dbSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="Fire.Common.Properties.Settings.dbFireConnectionString" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="1" passwordAttemptWindow="10" passwordStrengthRegularExpression=""/> </providers> </membership> <roleManager enabled="true" defaultProvider="dbSqlRoleProvider"> <providers> <add connectionStringName="Fire.Common.Properties.Settings.dbFireConnectionString" applicationName="/" name="dbSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/> </providers> </roleManager> <authentication mode="Forms"> <forms loginUrl="Login.aspx" cookieless="UseCookies" protection="All" timeout="30" requireSSL="false" slidingExpiration="true" defaultUrl="default.aspx" enableCrossAppRedirects="false"/> </authentication> <authorization> <allow users="*"/> <allow users="?"/> </authorization> <customErrors mode="Off"> </customErrors> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </controls> </pages> <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpModules> </system.web> <location path="~/Admin"> <system.web> <authorization> <allow roles="Admin"/> <allow roles="System"/> <deny users="*"/> </authorization> </system.web> </location> <location path="~/Admin/System"> <system.web> <authorization> <allow roles="System"/> <deny users="*"/> </authorization> </system.web> </location> <location path="~/Export"> <system.web> <authorization> <allow roles="Export"/> <deny users="*"/> </authorization> </system.web> </location> <location path="~/Field"> <system.web> <authorization> <allow roles="Field"/> <deny users="*"/> </authorization> </system.web> </location> <location path="~/Default.aspx"> <system.web> <authorization> <allow roles="Admin"/> <allow roles="System"/> <allow roles="Export"/> <allow roles="Field"/> <deny users="?"/> </authorization> </system.web> </location> <location path="~/Login.aspx"> <system.web> <authorization> <allow users="*"/> <allow users="?"/> </authorization> </system.web> </location> <location path="~/App_Themes"> <system.web> <authorization> <allow users="*"/> <allow users="?"/> </authorization> </system.web> </location> <location path="~/Includes"> <system.web> <authorization> <allow users="*"/> <allow users="?"/> </authorization> </system.web> </location> <location path="~/WebServices"> <system.web> <authorization> <allow users="*"/> <allow users="?"/> </authorization> </system.web> </location> <location path="~/Authentication_JSON_AppService.axd"> <system.web> <authorization> <allow users="*"/> <allow users="?"/> </authorization> </system.web> </location> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CSharp.CSharpCodeProvider,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="WarnAsError" value="false"/> </compiler> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="OptionInfer" value="true"/> <providerOption name="WarnAsError" value="false"/> </compiler> </compilers> </system.codedom>  <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <remove name="ScriptModule"/> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <remove name="ScriptHandlerFactory"/> <remove name="ScriptHandlerFactoryAppServices"/> <remove name="ScriptResource"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptResource" verb="GET,HEAD" path="ScriptResource.axd" preCondition="integratedMode" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </handlers> </system.webServer> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> </assemblyBinding> </runtime> </configuration>

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Passing array values using Ajax & JSP

- by Maya

This is my chart application... <script type="text/javascript" > function listbox_moveacross(sourceID, destID) { var src = document.getElementById(sourceID); var dest = document.getElementById(destID); for(var count=0; count < src.options.length; count++) { if(src.options[count].selected == true) { option = src.options[count]; newOption = document.createElement("option"); newOption.value = option.value; newOption.text = option.text; newOption.selected = true; try { dest.add(newOption,null); //Standard src.remove(count,null); alert("New Option Value: " + newOption.value); } catch(error) { dest.add(newOption); // IE only src.remove(count); alert("success IE User"); } count--; } } } function printValues(oSel) { len=oSel.options.length; for(var i=0;i<len;i++) { if(oSel.options[i].selected) { data+="\n"+ oSel.options[i].text + "["+ "\t" + oSel.options[i].value + "]"; } } type=document.getElementById("typeId"); type_text=type.options[type.selectedIndex].text; type_value=document.getElementById("typeId").value; } function GetSelectedItem() { len = document.chart.d.length; i = 0; chosen = ""; for (i = 0; i < len; i++) { if (document.chart.d[i].selected) { chosen = chosen + document.chart.d[i].value + "\n" } } return chosen } $(document).ready(function() { var d; var current_month; var month; var str; var w; var sel; var sel_data; var sel_data_value; $('.submit').click(function(){ // to get current month d=new Date(); month=new Array(12); month[0]="January"; month[1]="February"; month[2]="March"; month[3]="April"; month[4]="May"; month[5]="June"; month[6]="July"; month[7]="August"; month[8]="September"; month[9]="October"; month[10]="November"; month[11]="December"; current_month=d.getMonth(); str=month[d.getMonth()]; w=document.chart.periodId.selectedIndex; // to get selected index value.... sel=document.chart.periodId.options[w].text; // to get selected index value text... for(i=sel;i>=1;i--) { alert(month[i]); } sel_data=document.chart.d.selectedIndex; sel_data_value=document.chart.d.options[sel_data].text; var data_len=document.chart.d.length; var j=0; var chosen=""; for(j=0;j<data_len;j++) { if(document.chart.d.options[i].selected) { chosen=chosen+document.chart.d.options[i].value; } } chart = new Highcharts.Chart({ chart: { renderTo: 'container', defaultSeriesType: 'column' }, title: { text: document.chart.chartTitle.value }, subtitle: { text: 'Source: WorldClimate.com' }, xAxis: { categories: month }, yAxis: { min: 0, title: {text: 'Count' } }, legend: { layout: 'vertical', backgroundColor: '#FFFFFF', align: 'left', verticalAlign: 'top', x: 100, y: 70, floating: true, shadow: true }, tooltip: { formatter: function() { return ''+ this.x +': '+ this.y +' mm'; } }, plotOptions: { column: { pointPadding: 0.2, borderWidth: 0 } }, series: [{ name: sel_data_value, data: [50, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4] }, { name: 'New York', data: [83.6, 78.8, 98.5, 93.4, 106.0, 84.5, 105.0, 104.3, 91.2, 83.5, 106.6, 92.3] }, { name: 'London', data: [48.9, 38.8, 39.3, 41.4, 47.0, 48.3, 59.0, 59.6, 52.4, 65.2, 59.3, 51.2] }, { name: 'Berlin', data: [42.4, 33.2, 34.5, 39.7, 52.6, 75.5, 57.4, 60.4, 47.6, 39.1, 46.8, 51.1] }] }); }); }); </script> <%! Connection con = null; Statement stmt = null; ResultSet rs = null; String url = "jdbc:postgresql://192.168.1.196:5432/autocube3"; String user = "autocube"; String pass = "autocube"; String query = ""; int mid; %> <% ChartCategory chartCategory = new ChartCategory(); chartCategory.setBar_name("vehicle reporting"); chartCategory.setMonth("3"); chartCategory.setValue("1000"); if (request.getParameter("mid") != null) { mid = Integer.parseInt(request.getParameter("mid")); } else { mid = 0; } Class.forName("org.postgresql.Driver"); con = DriverManager.getConnection(url, user, pass); System.out.println("Connected to Database"); stmt = con.createStatement(); rs = stmt.executeQuery("select code,description from plant"); %> </head> <body> <form method="post" name="chart"> <fieldset> <legend>Chart Options</legend> <br />  <label for="hstate">Plant:</label> <select name="plantId" size="1" id="plantId" >  <% while (rs.next()) { %> <option value="<%=rs.getString("code")%>"><%=rs.getString("description")%></option> <% } String plant = request.getParameter("hstate"); System.out.println("Selected Plant" + request.getParameterValues("plantId")); %> </select> <br /> <label for="hcountry">Period</label> <select name="periodId" id="periodId"> <option value="0">1</option> <option value="1">2</option> <option value="2">3</option> <option value="3">4</option> <option value="4">5</option> <option value="5">6</option> <option value="6">7</option> <option value="7">8</option> <option value="8">9</option> <option value="9">10</option> <option value="10">11</option> <option value="11">12</option> </select> <br/>  <label for="hstate" >Interval</label> <select name="intervalId" id="intervalId"> <option value="day">Day</option> <option value="month" selected>Month</option> </select> </fieldset> <fieldset> <legend>Chart Data</legend> <br/> <br/> <table > <tbody> <tr> <td> &emsp;<select multiple name="data" size="5" id="s" style="width: 230px; height: 130px;" > <% String[] list = ReportField.getList(); for (int i = 0; i < list.length; i++) { String field = ReportField.getFieldName(list[i]); %> <option value="<%=field%>"><%=list[i]%></option> <% //System.out.println("Names :" + list[i]); //System.out.println("Field Names :" + field); } %> </select> </td> <td> <input type="button" value=">>" onclick="listbox_moveacross('s', 'd')" /><br/> <input type="button" value="<<" onclick="listbox_moveacross('d', 's')" /> &emsp; </td> <td> &emsp; <select name="selectedData" size="5" id="d" style="width: 230px; height: 130px;"> </select></td> <% for (int i = 0; i <= 4; i++) { String arr = request.getParameter("selectedData"); System.out.println("Arrya" + arr); } %> </tr> </tbody> </table> <br/> </fieldset> <fieldset> <legend>Chart Info</legend> <br/> <label for="hstate" >Type</label> <select name="typeId" id="typeId"> <option value="" selected>select...</option> <option value="bar">Bar</option> <option value="pie" >Pie</option> <option value="line" >Line</option> </select> <br/> <label for="uname" id="titleId">Title </label> <input class="text" type="text" name="chartTitle"/> <br /> <label for="uemail2">Pin to Dash board:</label> <input class="text" type="checkbox" id="pinId" name="pinId"/> </fieldset> <input class="submit" type="button" value="Submit" />  </form> <div id="container" style="width: 800px; height: 400px; margin: 0 auto"> </div> </body> </html> using javascript function, am storing the selected listbox values in 'sel_data_value'. I need to pass this selected array values to database to retrieve values regarding selection. How can i do this using ajax. i don know how to pass array values in ajax and retrieve it from database. Thanks.

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MVC - Ajax form - return partial view doesnt update in <div> target

- by Jack

I have an index view that I want to update automatically as the user types in a client id. I got something similiar to work (only it was updating just a label) - but this will not work. What happens is the partial is just rendered by itself (not in place of the UpdateTargetID). So the data is rendered on a new page. Here is my code: Controller: public ActionResult ClientList(string queryText) { var clients = CR.GetClientLike(queryText); return PartialView("ClientIndex", clients); } Partial View: <table> <thead> <tr> <td>Client ID</td> <td>Phone1</td> <td>Phone2</td> <td>Phone3</td> <td>Phone4</td> </tr> </thead> <tbody> <% if (Model != null) { foreach (Client c in Model) { %> <tr> <td><%= Html.Encode(c.ClientID)%></td> <td><%= Html.Encode(c.WorkPhone)%></td> <td><%= Html.Encode(c.WorkPhone1)%></td> <td><%= Html.Encode(c.WorkPhone2)%></td> <td><%= Html.Encode(c.WorkPhone3)%></td> </tr> <% } } %> </tbody> Main View: Insert code messed up, so this is just copy/pasted: $(function() { $("#queryText").keyup(function() { $('#sForm').submit(); }); }); <% using (Ajax.BeginForm("ClientList", /* new { queryText = Form.Controls[2] ?? }*/"", new AjaxOptions { UpdateTargetId = "status", InsertionMode = InsertionMode.Replace }, new { @id = "sForm" })) { % <% } % <div id="status" class="status" name="status"> <%--<% Html.RenderPartial("ClientIndex", ViewData["clients"]); %> Should this be here???? --%> </div>

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Django templates crashes with no sense

- by user233323

Hello I'm trying to use google visualization API along with django templates system. I got an error that don't know how to fix. The error is the following: invalid_block_tag raise self.error(token, "Invalid block tag: '%s'" % command) django.template.TemplateSyntaxError: Invalid block tag: 'endfor' The code is: function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('date', 'time'); data.addColumn('number', 'x'); data.addColumn('number', 'y'); data.addColumn('number', 'z'); data.addRows([ {% for d in datos &} [new Date({{d.instante|date:"Y, m, d, H, i, s"}}), {{d.x}}, {{d.y}}, {{d.z}}] {% if not forloop.last %},{% endif %} ]); {% endfor %} var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div')); chart.draw(data, {displayAnnotations: true}); } Thanks you all!

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Django ORM: Ordering w/ aggregate functions — None special treatment

- by deno

Hi, I'm doing query like that: SomeObject.objects.annotate(something=Avg('something')).order_by(something).all() Now, I normally have an aggregate field in my model that I use with Django signals to keep in sync, however in this case perfomance isn't an issue so I thought I'd keep it simple and just use subqueries. This approach, however, presented an unexpected issue: It all works grate if aggregate function results are like this: [5.0, 4.0, 6.0 … (etc, just numbers)] However if you mix in some Nones than it's being ordered like this: [None, 5.0, 4.0 …] The issue is that None has higher value than any number, while it should have value at most of 0. I'm using PostgreSQL and haven't tested w/ other DBs. I haven't actually checked what query is generated etc. I worked it around by just sorting in memory: sorted(…, key=lambda _:_.avg_rating if _.avg_rating is not None else 0) So I'm just curious if you know a way to do it w/ just Django ORM. Perhaps .where? or something… Kind regards

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How to use jqGrid in django frame work

- by shrenik

Anyone who has tried to use JQGrid a Jquery plugin with django? Please share your knowledge/code samples

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Best practice for Python & Django constants

- by Dylan Klomparens

I have a Django model that relies on a tuple. I'm wondering what the best practice is for refering to constants within that tuple for my Django program. Here, for example, I'd like to specify "default=0" as something that is more readable and does not require commenting. Any suggestions? Status = ( (-1, 'Cancelled'), (0, 'Requires attention'), (1, 'Work in progress'), (2, 'Complete'), ) class Task(models.Model): status = models.IntegerField(choices=Status, default=0) # Status is 'Requires attention' (0) by default. EDIT: If possible I'd like to avoid using a number altogether. Somehow using the string 'Requires attention' instead would be more readable.

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Django deployment: PIL and virtualenv problem

- by AndriJan

Hey guys, I'm deploying a Django site on my Vserver (Debian Lenny) and I'm having problem with PIL. I'm using virtualenv as well. When I'm in the virtualenv and type pip install -U PIL everything installs fine and I get this: *** TKINTER support not available --- JPEG support available --- ZLIB (PNG/ZIP) support available *** FREETYPE2 support not available *** LITTLECMS support not available And when I go in to the shell (python manage.py shell) and type from PIL import Image I get no error. But when I use it in the Django project (uploading an image in the admin for example) I just get No module named PIL I don't think it's a problem with the model because it works fine on the development machine but here is part of the class: class Category(models.Model): name = models.CharField(max_length=255, verbose_name="Name") logo = models.ImageField(upload_to='images/category/', blank=True, null=True, verbose_name="Logo") I'm going out of my mind about this. I feel like this is a very common issue but I've been trying to google this all day with no luck. Thanks in advance, AndriJan

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django select max field from mysql when column is varchar

- by doza

Hi, Using Django 1.1, I am trying to select the maximum value from a varchar column (in MySQL.) The data stored in the column looks like: 9001 9002 9017 9624 10104 11823 (In reality, the numbers are much bigger than this.) This worked until the numbers incremented above 10000: Feedback.objects.filter(est__pk=est_id).aggregate(sid=Max('sid')) Now, that same line would return 9624 instead of 11823. I'm able to run a query directly in the DB that gives me what I need, but I can't figure out the best way to do this in Django. The query would be: select max(sid+0) from Feedback; Any help would be much appreciated. Thanks!

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Django auth without "auth_*" tables

- by Travis Jensen

We would like to use our own tables for user management instead of the Django "auth" tables. We already have database tables that include all of the relevant information our application needs but it isn't in the Django format. We would prefer not to have the information duplicated in two tables. We would like to utilize the auth package, though, as there is some very nice functionality that we don't want to replicate. I realize we could build our own auth backend, but that doesn't, as far as I can tell, remove the need for two sets of tables in this case. Am I correct in assuming that we cannot do this? I have found no docs that discuss how to modify the underlying model that the auth package is using. The backend simply pre-populates the user object that would eventually be saved in the auth tables. Thanks!

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Need to execute an ajax call incrementally after fixed time periods in javascript?

- by Ali

HI guys, I need to be able to make an ajax call to be made after every few minutes. Basically the ajax call would be to check on new emails in an inbox. If there are new emails it would download the emails to a database. I got all the server side code set up fine. I just need to know how do I set up on the front end the part where the ajax call is made after every few minutes plus it should be set up such that we don't end up with parallel ajax calls being made i.e if the ajax call hasn't returned a response it shouldn't start a new ajax request.

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Problem with Twitter basic authentication using AJAX

- by jelford

I'm developing a javascript App that needs, as part of its functionality, for users to be able to update their Twitter status. The App is designed to work on mobiles, and as such I don't really want to be sending users all the way over to the Twitter site to sign in; they should just be able to pass their credentials to the app, and I'll handle all the signin. So I'm trying to use the Basic Auth with the restful API. My code looks like: function postTweet(input){ $.ajax( { type: "POST", url: "http://twitter.com/statuses/update.json", data: {status: input}, dataType: "json", error: function() { alert("Some error occured"); }, success: function() { alert("Success!"); }, beforeSend: function(request) { request.setRequestHeader("Authorization", "Basic BASE64OFMYCREDENTIALS");} } ) ; } So, as far as I'm aware, this should perform the authentication from the XMLHttpRequest header, and then post the status. However, whenever I call this code, I get a "401 Unauthorized" error from Twitter. Below are the request & response headers from firebug: Request: OPTIONS /statuses/update.json HTTP/1.1 Host: twitter.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-gb,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Origin: null Access-Control-Request-Method: POST Access-Control-Request-Headers: authorization Response: HTTP/1.1 401 Unauthorized Date: Sat, 13 Mar 2010 11:08:58 GMT Server: hi Status: 401 Unauthorized WWW-Authenticate: Basic realm="Twitter API" X-Runtime: 0.00204 Content-Type: application/json; charset=utf-8 Cache-Control: no-cache, max-age=300 Set-Cookie: guest_id=1268478538488; path=/ _twitter_sess=BAh7CDoPY3JlYXRlZF9hdGwrCPlyNlcnAToHaWQiJWUyN2YzYjc3OTk2NGQ3%250ANzJkYTA4MjYzOWJmYTQyYmUyIgpmbGFzaElDOidBY3Rpb25Db250cm9sbGVy%250AOjpGbGFzaDo6Rmxhc2hIYXNoewAGOgpAdXNlZHsA--d687808459872da0aa6a89cab35fd347300b4d07; domain=.twitter.com; path=/ Expires: Sat, 13 Mar 2010 11:13:58 GMT Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 88 Connection: close Any help with this would be much appreciated, Thanks, jelford ps. I should mention I'm using JQuery, incase it's not clear.

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Apache/Django subdomains problem

- by Thomas

Now I have apache configuration which works only with localhost domain (http://localhost/). Alias /media/ "/sciezka/do/instalacji/django/contrib/admin/media/" Alias /site_media/ "/sciezka/do/plikow/site_media/" <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython SetEnv DJANGO_SETTINGS_MODULE settings PythonPath "['/thomas/django_projects/project'] + sys.path" PythonDebug On </Location> <Location "/site_media"> SetHandler none </Location> How can I make it working for some subdomains like pl.localhost or uk.localhost? This subdomains should display the same page what domain (localhost). Second question: It is possible change default localhost address (http://localhost/) to (http://localhost.com/) or (http://www.localhost.com/) or something else?

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Apache/Django subdomains problem

- by Thomas

Now I have apache configuration which works only with localhost domain (http://localhost/). Alias /media/ "/sciezka/do/instalacji/django/contrib/admin/media/" Alias /site_media/ "/sciezka/do/plikow/site_media/" <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython SetEnv DJANGO_SETTINGS_MODULE settings PythonPath "['/thomas/django_projects/project'] + sys.path" PythonDebug On </Location> <Location "/site_media"> SetHandler none </Location> How can I make it working for some subdomains like pl.localhost or uk.localhost? This subdomains should display the same page what domain (localhost). Second question: It is possible change default localhost address (http://localhost/) to (http://localhost.com/) or (http://www.localhost.com/) or something else?

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async handler deleted by the wrong thread in django

- by user3480706

I'm run this algorithm in my django application.when i run several time from my GUI django local server will stopped and i got this error Exception RuntimeError: RuntimeError('main thread is not in main loop',) in ignored Tcl_AsyncDelete: async handler deleted by the wrong thread Aborted (core dumped) code print "Learning the sin function" network =MLP.MLP(2,10,1) samples = np.zeros(2000, dtype=[('x', float, 1), ('y', float, 1)]) samples['x'] = np.linspace(-5,5,2000) samples['y'] = np.sin(samples['x']) #samples['y'] = np.linspace(-4,4,2500) for i in range(100000): n = np.random.randint(samples.size) network.propagate_forward(samples['x'][n]) network.propagate_backward(samples['y'][n]) plt.figure(figsize=(10,5)) # Draw real function x = samples['x'] y = samples['y'] #x=np.linspace(-6.0,7.0,50) plt.plot(x,y,color='b',lw=1) samples1 = np.zeros(2000, dtype=[('x1', float, 1), ('y1', float, 1)]) samples1['x1'] = np.linspace(-4,4,2000) samples1['y1'] = np.sin(samples1['x1']) # Draw network approximated function for i in range(samples1.size): samples1['y1'][i] = network.propagate_forward(samples1['x1'][i]) plt.plot(samples1['x1'],samples1['y1'],color='r',lw=3) plt.axis([-2,2,-2,2]) plt.show() plt.close() return HttpResponseRedirect('/charts/charts') how can i fix this error ?need a quick help

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ASP.NET MVC ajax chat

- by nccsbim071

I built an ajax chat in one of my mvc website. everything is working fine. I am using polling. At certain interval i am using $.post to get the messages from the db. But there is a problem. The message retrieved using $.post keeps on repeating. here is my javascript code and controller method. var t; function GetMessages() { var LastMsgRec = $("#hdnLastMsgRec").val(); var RoomId = $("#hdnRoomId").val(); //Get all the messages associated with this roomId $.post("/Chat/GetMessages", { roomId: RoomId, lastRecMsg: LastMsgRec }, function(Data) { if (Data.Messages.length != 0) { $("#messagesCont").append(Data.Messages); if (Data.newUser.length != 0) $("#usersUl").append(Data.newUser); $("#messagesCont").attr({ scrollTop: $("#messagesCont").attr("scrollHeight") - $('#messagesCont').height() }); $("#userListCont").attr({ scrollTop: $("#userListCont").attr("scrollHeight") - $('#userListCont').height() }); } else { } $("#hdnLastMsgRec").val(Data.LastMsgRec); }, "json"); t = setTimeout("GetMessages()", 3000); } and here is my controller method to get the data: public JsonResult GetMessages(int roomId,DateTime lastRecMsg) { StringBuilder messagesSb = new StringBuilder(); StringBuilder newUserSb = new StringBuilder(); List<Message> msgs = (dc.Messages).Where(m => m.RoomID == roomId && m.TimeStamp > lastRecMsg).ToList(); if (msgs.Count == 0) { return Json(new { Messages = "", LastMsgRec = System.DateTime.Now.ToString() }); } foreach (Message item in msgs) { messagesSb.Append(string.Format(messageTemplate,item.User.Username,item.Text)); if (item.Text == "Just logged in!") newUserSb.Append(string.Format(newUserTemplate,item.User.Username)); } return Json(new {Messages = messagesSb.ToString(),LastMsgRec = System.DateTime.Now.ToString(),newUser = newUserSb.ToString().Length == 0 ?"":newUserSb.ToString()}); } Everything is working absloutely perfect. But i some messages getting repeated. The first time page loads i am retrieving the data and call GetMessages() function. I am loading the value of field hdnLastMsgRec the first time page loads and after the value for this field are set by the javascript. I think the message keeps on repeating because of asynchronous calls. I don't know, may be you guys can help me solve this. or you can suggest better way to implement this.

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Django Auth Model Issue - AUTH_USER_MODEL Not Installed

- by Ian Warner

Trying to debug this error with getting a Django project running ImproperlyConfigured: AUTH_USER_MODEL refers to model 'accounts.User' that has not been installed Running python manage.py migrate Must iterate i am in no way a python or django expert - I have simply inherited someone elses project that I am trying to get running for the team here. I have followed steps to install postgres required modules including south creating database for postgres Any help appreciated on how to debug this. settings/base.py contains INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS LOCAL_APPS = ( 'apps.core', 'apps.accounts', 'apps.project_tool', 'apps.internal', 'apps.external', ) so apps.accounts exits - but it asks for AUTH_USER_MODEL = 'accounts.User' - should it be AUTH_USER_MODEL = 'apps.accounts.User'?

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How can I run django application using Aptana Studio

- by Software Enthusiastic

Can anyone please help setting and running django project using Aptana Studio?

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Problems with Snow Leopard, Django & PIL

- by Cato Johnston

Hi I am having some trouble getting Django & PIL work properly since upgrading to Snow Leopard. I have installed freetype, libjpeg and then PIL, which tells me: --- TKINTER support ok --- JPEG support ok --- ZLIB (PNG/ZIP) support ok --- FREETYPE2 support ok but when I try to upload a jpeg through the django admin interface I get: Upload a valid image. The file you uploaded was either not an image or a corrupted image. It works fine with PNG files. Any Ideas?

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Rate limiting Django admin login with Nginx to prevent dictionary attack

- by shreddies

I'm looking into the various methods of rate limiting the Django admin login to prevent dictionary attacks. One solution is explained here: simonwillison.net/2009/Jan/7/ratelimitcache/ However, I would prefer to do the rate limiting at the web server side, using Nginx. Nginx's limit_req module does just that - allowing you to specify the maximum number of requests per minute, and sending a 503 if the user goes over: http://wiki.nginx.org/NginxHttpLimitReqModule Perfect! I thought I'd cracked it until I realised that Django admin's login page is not in a consistent place, eg /admin/blah/ gives you a login page at that URL, rather than bouncing to a standard login page. So I can't match on the URL. Can anyone think of another way to know that the admin page was being displayed (regexp the response HTML?)

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