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• Rendering a variable with erb.

  - by TZer0

  I've got the following problem: I have rhtml (html minced together with ruby inside <% % and <%= % tags) stored in a database which I want to render. The information is acquired through a query. I need to be able to evaluate the information I get from the database as though as it was normal content inside the .erb-file. What I currently have: <% @mymods.each do |mod| %> <%= render_text(mod["html"])%> <% end %> Where mod["html"] is the variable containing the rhtml-code and @mymods an array of objects from the query. I have currently no idea what function I should use (render_text does, of course, not work). Help is greatly appreciated. /TZer0

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• Java_swt in eclipse

  - by Ken

  Can someone tell me where I can find the executeable "java_swt"? I see multiple sites that say it is embedded in eclipse, and other sites say it is shipped with Mac swt drops. I have the zip file for a mac called "swt-3.5M6-carbon-macosx.zip" and i have the eclipse IDE installed on my test mac machine and windows machine. But i cannot find this executeable which i need to run an swt app smoothly on mac os x. Any help would be appreciated. Thanks.

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• Problem with a SQL statement

  - by benwad

  I'm trying to enter values into a database table using a form and a PHP function. The PHP seems to be fine as the SQL statement it creates looks okay, but the database always throws up an error. This is the SQL statement that my code has generated (with arbitrary values): INSERT INTO Iteminfo ('itemName', 'itemSeller', 'itemCategory', 'itemDescription', 'itemPrice', 'itemPostage', 'itemBegin', 'itemEnd', 'buynow', 'itemPicture') values ('gorillaz album', 'ben', 'music', 'new one ', '5.00', '1.00', '2010-03-15 14:59:51', '2010-03-16 14:59:51', '0', 'http://www.thefader.com/wp-content/uploads/2010/01/gorillaz-plastic-beach.jpg') This throws up an error both when I use the PHP function to evaluate the query and also when I use phpMyAdmin to enter the query manually. However, I can't see anything wrong with it. Can anyone shed some light on this? All of the fields are VARCHAR values, except for itemPrice and itemPostage (which are stored as DECIMAL(4,2)) and the itemBegin and itemEnd, which are stored as DATETIMEs.

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• php / mysql pagination

  - by arrgggg

  Hi, I have a table with 58 records in mysql database. I was able to connect to my database and retrive all records and made 5 pages with links to view each pages using php script. webpage will look like this: name number john 1232343456 tony 9878768544 jack 3454562345 joe 1232343456 jane 2343454567 andy 2344560987 marcy 9873459876 sean 8374623534 mark 9898787675 nancy 8374650493 1 2 3 4 5 that's the first page of 58 records and those 5 numbers at bottom are links to each page that will display next 10 records. I got all that. but what I want to do is display the links in this way: 1-10 11-20 21-30 31-40 41-50 51-58 note: since i have 58 records, last link will display upto 58, instead of 60. Since I used the loop to create this link, depending on how many records i have, the link will change according to the number of records in my table. How can i do this? Thanks.

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• CodeIgniter based e-shop, shipping and gift address design problem

  - by alexander

  While building an ecommerce platform I have run into design problems. I'm working with the built-in CodeIgniter's cart class. It stores all the cart information in session. Let say that cart has already been filled with products and user clicks checkout. When should I store order in database? Just after that click or after several steps of gathering information and stoing it in session? How to deal with additional features like different shipping methods? Should I add it to the basket first and get additional (gift address) to session? I dont want to store it in database because of the relation between gift address and order is needed and since I dont know what's the ID of the order. I'm puzzled :) Additionally I think its crucial to keep cart aware of shipping methods and additional bought services (by selecting gift address there is an extra fee) because the cart content is just like an reciept? In brief, what is the best practice to process checkout?

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• What are the best tools for Sql Server version control

  - by Mendy

  After reading this post, and the suggestion to use Team Edition for Database Professionals, I want to know is there any equivalent to this for SQL server 2008 / Visual stuio 2010 ultimate. I'm looking for tool need to do all the thing that Jeff mention in his article: Create test data. Schema comparison. Data comparison. Database unit testing. Refactoring. Integrated T-SQL editor, a first class language construct in the IDE, just like C# and VB.NET.

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• Using set with values from a table

  - by gozzilli

  I'm writing a database of all DVDs I have at home. One of the fields, actors, I would like it to be a set of values from an other table, which is storing actors. So for every film I want to store a list of actors, all of which selected from a list of actors, taken from a different table. Is it possible? How do I do this? It would be a set of foreign keys basically. I'm using a MySQL database for a Django application (python), so any hint in SQL or Python would be much appreciated. I hope the question is clear, many thanks.

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• Android v1.5 w/ browser data storage

  - by Sirber

  I'm trying to build an offline web application which can sync online if the network is available. I tryed jQuery jStore but the test page stop at "testing..." whitout result, then I tryed Google Gears which is supposed to be working on the phone but it gears is not found. if (window.google && google.gears) { google.gears.factory.getPermission(); // Database var db = google.gears.factory.create('beta.database'); db.open('cominar-compteurs'); db.execute('create table if not exists Lectures' + ' (ID_COMPTEUR int, DATE_HEURE timestamp, kWh float, Wmax float, VAmax float, Wcum float, VAcum float);'); } else { alert('Google Gears non trouvé.'); } the code does work on Google Chrome v5.

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• How to "defragment" MongoDB index effectively in production?

  - by dfrankow

  I've been looking at MongoDB. Feels good. I added some indexes to a collection, uploaded a bunch of data, then removed all the data, and I noticed the indexes did not change size, similar to the behavior reported here. If I call db.repairDatabase() the indexes are then squashed to near-zero. Similarly if I don't remove all the data, but call repairDatabase(), the indexes are squashed somewhat (perhaps because unused extends are truncated?). I am getting index size from "totalIndexSize" of db.collection.stats(). However, that takes a long time (I've read it could be hours on a large database). It's unclear to me how available the database is for reads or writes while it is running. I am guessing not so available. Since I want to run as few instances of mongod as possible, I want to understand more about how indexes are managed after deletes. Can anyone point me to anything or give any advice?

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• Autoplay an Audio File on Mobile Safari

  - by phantomdata

  Hey guys, I've got a little system dashboard web app that I've written, replete with alarm notifications. I've had it working for quite some time on mobile safari, but recently wanted to add audio to the alarm notifications to allow me to easily know when there are alarms and I'm not looking directly at the display. The alarm notifications are populated through a (relatively) constantly polling ajax request that pulls in and displays an alarm banner if alarms are present. I wanted to add an auto-playing 'alarm' sound as well, but no dice for Safari Mobile. I've tried using HTML5 and embedded objects with no avail. The Apple documentation does state that you can't auto-play an audio file and it must be activated through user action to conserve bandwidth. Has anyone found a way around this in a WLAN setting?

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• Disk-based caching of dynamic images in IIS 7

  - by Daniel Schierbeck

  I'm writing an image server which needs to handle a relatively large number of concurrent requests (~5,000). The images being served are dynamically scaled down and cropped based on per-image specifications, which are queried from a database. The number of images is rather large, so an in-memory cache isn't viable (thrashing would most definitely occur). I'm using native caching in IIS 7 to avoid hitting the ASP.NET app which generates the images on-the-fly. I've looked around, but I couldn't find a simple way to configure IIS to store the cache on-disk -- is there such an option, or would I need to roll my own? I'd rather avoid placing the generated images in a public folder, so they can be served statically, since I would prefer to invalidate the cache entries using a query parameter (last-edit time from the database,) which doesn't seem possible to reconcile with static caching. I would love to get some feedback on this!

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• Rails CSV import, adding to a related table

  - by Jack

  Hi, I have a csv importing system on my app (used locally only) which parses the csv file line by line and adds the data to the database table. This is based on a tutorial here. require 'csv' def csv_import @parsed_file=CSV::Reader.parse(params[:dump][:file]) n = 0 @parsed_file.each_with_index do |row, i| next if i == 0 #ignore the first row course = Course.new course.title = row[0] course.unit_code = row[1] course.course_type = row[2] course.value = row[3] course.pass_mark = row[4] if course.save n = n+1 GC.start if n%50==0 end flash.now[:message] = "CSV Import Successful, #{n} new courses added to the database." end redirect_to(courses_url) end This is all in the courses controller and works fine. There is a relationship that courses HABTM years and years HABTM courses. In the csv file (effectively in row[5] to row[8]) are the year_id s. Is there a way that I can add this within the method above. I am confused as to how to loop over the 4 items and add them to the courses_years table. Thank you Jack

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• Best calculator software to help programmers

  - by RHaguiuda

  As a embedded systems programmer I always need to make lots of base conversions (dec to hex, hex to bin and so on...), and I must admit: Windows 7 calculator is a good calc, but too limited in my point of view. I work a lot with communications protocols and it`s common to need some base conversion in this field of knowledge. I`m looking for a calculator software (not a hardware one), to help with base conversions, but it must also support scientific calc. Can anyone help on this? Since this subject is intended to help programmers, I did not ask this in SuperUser.com. Thanks.

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• Double-Escaped Unicode Javascript Issue

  - by Jeffrey Winter

  I am having a problem displaying a Javascript string with embedded Unicode character escape sequences (\uXXXX) where the initial "\" character is itself escaped as "&#92;" What do I need to do to transform the string so that it properly evaluates the escape sequences and produces output with the correct Unicode character? For example, I am dealing with input such as: "this is a &#92;u201ctest&#92;u201d"; attempting to decode the "&#92;" using a regex expression, e.g.: var out = text.replace('/&#92;/g','\'); results in the output text: "this is a \u201ctest\u201d"; that is, the Unicode escape sequences are displayed as actual escape sequences, not the double quote characters I would like.

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• sql server 2005

  - by NIKS

  How to create database in sql server 2005. How to start with sql server 2005.

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• Checkbox 'Checked' in ListView is restored after scrolling

  - by adrianrdzv

  I'm having the following problem: I have a ListActivity, which its ListView is composed by an icon, text and a checkbox (using LayoutInflater). The Adapter for the ListView extends ResourceCursorAdapter (i.e. the data source of the ListView is retrieved from a database, also the Checked status of each row) Everything works pretty Ok, except when I uncheck/check the checkbox in any row, if I scroll down until the modified checkbox is no longer visible, and then scroll up, the checkbox is restored to its original state. The database IS modified, this is not the problem (i.e. if I modify a row and exit the activity, and enter again, the modified row is displayed Ok). My guess is that this has something to do on how the list is rendered because for some reason the ListView "renders" the original state of all rows when it was first populated when scrolling. I've been looking around for this bug but I don't find anybody that had this problem. I appreciate any advice you have.

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• How difficult is it to migrate away from Google App Engine?

  - by Ignas Limanauskas

  I am thinking of making an (initially) small Web Application, which would eventually have a potential to grow. All things considered Google App Engine seems like a very attractive option. Say, user base and complexity grows and for one or other reason I needed to leave GAE behind. How difficult would it be to migrate away? 1) Does GAE provide a way to export the database? What format would it be? Would it be difficult to put it under MySQL (or similar)? 2) In which areas (ex. database access, others?) would I have to use GAE API? I.e. which parts of implementation would have to be abstracted away / interfaced? 3) Alternatively, is it even worth to keep GAE API outside, say, if there is nothing much I would need to use.

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• SQLite multi process access

  - by Nicolas

  Hello, We are using SQLite in a multi processes and multi threaded application. The SQLite database files are encrypted using the embedded SQLite encryption. The FAQ states that SQLite should be able to manage multi process accesses using locks mechanism. We are experiencing a strange problem: When many threads are accessing the same database file, sometime constrains violations occur, more specifically - a field with a unique constrain is getting duplicate values after calling "insert or replace" statement. It happens quite often now, that we are using the encryption. Before we started using SQLite encryption we did not notice such a behavior. Are there any specific known issues with this?

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• Is it possible to use WIndows Speech Recognition Engine in a word pronunciation game?

  - by XBasic3000

  I use to create an application that uses the windows speech recognition engine or the SAPI. its like a game for pronunciation that it give you score when you pronounce it correctly. but when i started experiments with SAPI, it has poor recognition unless if you load a grammar on it (XML) its give best recognition result. but the problem now is closest pronunciation from the input text will be recognize. for example: Database - dedebase - correct. even if you mispronounce it. it gives you correct answers. without using the xml grammar when you say database it give you "in the base/the base/data base/etc..." please post your answer,suggestion,clarification. votes for best answer. is it possible or not? by the way i use delphi compiler on the projects....

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• wamp server not working? or bad php code

  - by lclaud

  I have this PHP code: <?php $username="root"; $password="******";// censored out $database="bazadedate"; mysql_connect("127.0.0.1",$username,$password); // i get unknown constant localhost if used instead of the loopback ip @mysql_select_db($database) or die( "Unable to select database"); $query="SELECT * FROM backup"; $result=mysql_query($query); $num=mysql_numrows($result); $i=0; $raspuns=""; while ($i < $num) { $data=mysql_result($result,$i,"data"); $suma=mysql_result($result,$i,"suma"); $cv=mysql_result($result,$i,"cv"); $det=mysql_result($result,$i,"detaliu"); $raspuns = $raspuns."#".$data."#".$suma."#".$cv."#".$det."@"; $i++; } echo "<b> $raspuns </b>"; mysql_close(); ?> And it should return a single string containing all data from the table. But it says "connection reset when loading page". the log is : [Tue Jun 15 16:20:31 2010] [notice] Parent: child process exited with status 255 -- Restarting. [Tue Jun 15 16:20:31 2010] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations [Tue Jun 15 16:20:31 2010] [notice] Server built: Dec 10 2008 00:10:06 [Tue Jun 15 16:20:31 2010] [notice] Parent: Created child process 2336 [Tue Jun 15 16:20:31 2010] [notice] Child 2336: Child process is running [Tue Jun 15 16:20:31 2010] [notice] Child 2336: Acquired the start mutex. [Tue Jun 15 16:20:31 2010] [notice] Child 2336: Starting 64 worker threads. [Tue Jun 15 16:20:31 2010] [notice] Child 2336: Starting thread to listen on port 80. [Tue Jun 15 16:20:35 2010] [notice] Parent: child process exited with status 255 -- Restarting. [Tue Jun 15 16:20:35 2010] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations [Tue Jun 15 16:20:35 2010] [notice] Server built: Dec 10 2008 00:10:06 [Tue Jun 15 16:20:35 2010] [notice] Parent: Created child process 1928 [Tue Jun 15 16:20:35 2010] [notice] Child 1928: Child process is running [Tue Jun 15 16:20:35 2010] [notice] Child 1928: Acquired the start mutex. [Tue Jun 15 16:20:35 2010] [notice] Child 1928: Starting 64 worker threads. [Tue Jun 15 16:20:35 2010] [notice] Child 1928: Starting thread to listen on port 80. Any idea why it outputs nothing?

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• Is it safe to convert a mysqlpp::sql_blob to a std::string?

  - by Runcible

  I'm grabbing some binary data out of my MySQL database. It comes out as a mysqlpp::sql_blob type. It just so happens that this BLOB is a serialized Google Protobuf. I need to de-serialize it so that I can access it normally. This gives a compile error, since ParseFromString() is not intended for mysqlpp:sql_blob types: protobuf.ParseFromString( record.data ); However, if I force the cast, it compiles OK: protobuf.ParseFromString( (std::string) record.data ); Is this safe? I'm particularly worried because of this snippet from the mysqlpp documentation: "Because C++ strings handle binary data just fine, you might think you can use std::string instead of sql_blob, but the current design of String converts to std::string via a C string. As a result, the BLOB data is truncated at the first embedded null character during population of the SSQLS. There’s no way to fix that without completely redesigning either String or the SSQLS mechanism." Thanks for your assistance!

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• NHibernate - is property lazy loading possible?

  - by Ben

  I've got some binary data that I store and was going to separate this out into a separate table so it could be lazy loaded. However, i then came across this post by Ayende (http://ayende.com/Blog/archive/2010/01/27/nhibernate-new-feature-lazy-properties.aspx) which suggests that property lazy loading is now possible. I have added the lazy="true" attribute to my property mapping but the field is still loaded from the database (I am using a simple text field to test). My query: return _session.CreateQuery("from Product") .SetMaxResults(1) .UniqueResult<Product>(); Mapping: <property name="Description" type="string" column="FullDescription" lazy="true"/> Has anyone been able to get this working? Personally I prefer this approach than having to add another table to my database.

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• Restarting service from a client computer without rights

  - by Jason

  I have already created the program to restart a SQL database but it only works if the client has the rights. This is going to be done on a local network from a client computer when they can't get a person that has the password on the phone. Any thoughts I'm currently using the servicecontroller to start and stop database. When I don't have the rights I get a access denied error, or This operation might require other privileges. Not sure if impersonation would work since I don't have the userid and password.

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• Error in MySQL Workbench Forward Engineer Stored Procedures

  - by colithium

  I am using MySQL Workbench (5.1.18 OSS rev 4456) to forward engineer a SQL CREATE script. For every stored procedure, the automatic process outputs something like: DELIMITER // USE DB_Name// DB_Name// DROP procedure IF EXISTS `DB_Name`.`SP_Name` // USE DB_Name// DB_Name// CREATE PROCEDURE `DB_Name`.`SP_Name` (id INT) BEGIN SELECT * FROM Table_Name WHERE Id = id; END// The two lines that are simply the database name followed by the delimiter are errors and are reported as such when running the script. As long as they are ignored, it looks like everything gets created just fine. But why would it add those lines? I am creating the database in the WAMP environment which uses MySQL 5.1.36

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• How to clean sys.conversation_endpoints

  - by Manjoor

  I have a table, a trigger on the table implemented using service broker. More than Half million records are inserted daily into the table. The asynchronous SP is used to check sveral condition by using inserted data and update other tables. It was running fine for last 1 month and the SP was get executed withing 2-3 seconds of insertion of record. But now it take more than 90 minute. At present sys.conversation_endpoints have too much records. (Note that all the table are truncated daily as I do not need those records day after) Other database activities are normal (average 60% CPU Utilization). Now where i need to look?? I can re-create database without any problem but i don't think it is a good way to resolve the problem

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