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  • how to add data to database from rails console

    - by rails_guy
    I have a User model. >> @u = User.new => #<User id: nil, userid: nil, password: nil, created_at: nil, updated_at: nil, user_first_name: nil, user_last_name: nil, user_status: nil, user_type: nil> I am not able to add data to the Users table from the console. I am doing the following: >> @u.userid="test1" => "test1" >> @u.password="test2" => "test2" >> @u.user_first_name="test3" => "test3" >> @u.user_last_name="test4" => "test4" >> @u.user_status="test5" => "test5" >> @u.user_type="test6" => "test6" >> @u.save NoMethodError: undefined method `userid' for nil:NilClass what am i doing wrong? I just simply want to add one row of data to the app.

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  • database transaction

    - by user121196
    If I'm using a mysql client(eg. squirrel) to execute an update query, after 10 seconds, I cancelled the query, would there be partial update or would everything that's done be rolled back?

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  • Re-use of database object in sub-sonic

    - by cantabilesoftware
    Yet another newbie SubSonic/ActiveRecord question. Suppose I want to insert a couple of records, currently I'm doing this: using (var scope = new System.Transactions.TransactionScope()) { // Insert company company c = new company(); c.name = "ACME"; c.Save(); // Insert some options company_option o = new company_option(); o.name = "ColorScheme"; o.value = "Red"; o.company_id = c.company_id; o.Save(); o = new company_option(); o.name = "PreferredMode"; o.value = "Fast"; o.company_id = c.company_id; o.Save(); scope.Complete(); } Stepping through this code however, each of the company/company_option constructors go off and create a new myappDB object which just seems wasteful. Is this the recommended approach or should I be trying to re-use a single DB object - and if so, what's the easiest way to do this?

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  • Dynamic data-entry value store

    - by simendsjo
    I'm creating a data-entry application where users are allowed to create the entry schema. My first version of this just created a single table per entry schema with each entry spanning a single or multiple columns (for complex types) with the appropriate data type. This allowed for "fast" querying (on small datasets as I didn't index all columns) and simple synchronization where the data-entry was distributed on several databases. I'm not quite happy with this solution though; the only positive thing is the simplicity... I can only store a fixed number of columns. I need to create indexes on all columns. I need to recreate the table on schema changes. Some of my key design criterias are: Very fast querying (Using a simple domain specific query language) Writes doesn't have to be fast Many concurrent users Schemas will change often Schemas might contain many thousand columns The data-entries might be distributed and needs syncronization. Preferable MySQL and SQLite - Databases like DB2 and Oracle is out of the question. Using .Net/Mono I've been thinking of a couple of possible designs, but none of them seems like a good choice. Solution 1: Union like table containing a Type column and one nullable column per type. This avoids joins, but will definitly use a lot of space. Solution 2: Key/value store. All values are stored as string and converted when needed. Also use a lot of space, and of course, I hate having to convert everything to string. Solution 3: Use an xml database or store values as xml. Without any experience I would think this is quite slow (at least for the relational model unless there is some very good xpath support). I also would like to avoid an xml database as other parts of the application fits better as a relational model, and being able to join the data is helpful. I cannot help to think that someone has solved (some of) this already, but I'm unable to find anything. Not quite sure what to search for either... I know market research is doing something like this for their questionnaires, but there are few open source implementations, and the ones I've found doesn't quite fit the bill. PSPP has much of the logic I'm thinking of; primitive column types, many columns, many rows, fast querying and merging. Too bad it doesn't work against a database.. And of course... I don't need 99% of the provided functionality, but a lot of stuff not included. I'm not sure this is the right place to ask such a design related question, but I hope someone here has some tips, know of any existing work, or can point me to a better place to ask such a question. Thanks in advance!

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  • How to think in data stores instead of databases?

    - by Jim
    As an example, Google App Engine uses data stores, not a database, to store data. Does anybody have any tips for using data stores instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard to see anything differently. I can understand some of the benefits of data stores (e.g. performance and the ability to distribute data), but some good database functionality is sacrificed (e.g. joins). Does anybody who has worked with data stores like BigTable have any good advice to working with them?

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  • Using DateDiff in Entity Framwork on a SQL CE database

    - by deverop
    I have a method which should return a list of anonymous objects with a calculated column like this: var tomorrow = DateTime.Today.AddDays(1); return from t in this.Events where (t.StartTime >= DateTime.Today && t.StartTime < tomorrow && t.EndTime.HasValue) select new { Client = t.Activity.Project.Customer.Name, Project = t.Activity.Project.Name, Task = t.Activity.Task.Name, Rate = t.Activity.Rate.Name, StartTime = t.StartTime, EndTime = t.EndTime.Value, Hours = (System.Data.Objects.SqlClient.SqlFunctions.DateDiff("m", t.StartTime, t.EndTime.Value) / 60), Description = t.Activity.Description }; Unfortunately I get the following error from the DateDiff function: The specified method 'System.Nullable1[System.Int32] DateDiff(System.String, System.Nullable1[System.DateTime], System.Nullable`1[System.DateTime])' on the type 'System.Data.Objects.SqlClient.SqlFunctions' cannot be translated into a LINQ to Entities store expression. Any ideas what I could have done wrong here? EDIT: I also tried the EntityFunctions class mentioned here, but that did not work as well. Minutes = EntityFunctions.DiffMinutes(t.EndTime, t.StartTime),

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  • Personal project/idea database and tracking

    - by cbrulak
    How do you keep track of your personal projects and ideas? If you come up with this amazing idea how do you write it down? Notepad? Some text file somewhere? How do you track your progress,etc? I'm not talking about FogBugz,etc as they are for tracking team work, I'm talking about tracking my ideas and projects and any associated content (notes,screenshots,etc) Can you put your solution on a thumb drive? Any suggestions for other developers?

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  • Create link on page w/ web address stored in database

    - by RememberME
    This seems like it should be easy, but I can't seem to figure it out. All of my google searches lead me to linking to databases which isn't what I want to do. I'm a complete web development newb. I've roughly followed the NerdDinner tutorial in creating my web app. One of my stored fields is a web address. On the Index and Details pages, when I display the info from my record, I want the web address to be a clickable link to the website. It's currently displayed as: <%= Html.Encode(Model.Subcontract.company1.website) %>

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  • Creating a proper CMS thoughts

    - by dallasclark
    I'm just about to expand the functionality of our own CMS but was thinking of restructuring the database to make it simpler to add/edit data types and values. Currently, the CMS is quite flat - the CMS requires a field in the database for every type of stored value. The first option that comes to mind is simply a table which keeps the data types (ie: Address 1, Suburb, Email Address etc) and another table which holds values for each of these data types. Just like how Wordpress keeps values in the 'options' table, serialize would be used to store an array of values. The second option is how Drupal works, the CMS creates tables for every data type. Unlike Wordpress, this can be a bit of an overkill but really useful for SQL queries when ordering and grouping by a particular value. What's everyone's thoughts?

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  • Core Data Relationships in pre-populated SQLite database

    - by Cardinal
    Hi All, I'm new to Core Data. Currently I have following tables on hand: tbl_teahcer tbl_student tbl_course tbl_student_course_map ----------- ----------- ---------- ---------------------- teacher_id student_id course_id student_id name name name course_id teahcer_id And I'm going to make the xcdatamodel as below: Course Teacher ------ ------- name name teacher <<----------> courses students <<---| | Student | ------- | name |----->> courses My questions are as follows: As I'd like to create TableView for Cource Entity, is it a must to create the Inverse Relationship from Teacher to Course, and Student to Course? What is the beneit for having the Inverse Relationship? I got some pre-defined data on hand, and I'd like to create a SQLite storage for pre-populated source. How can I set up the relationships (both directions) in SQLite? Thank you for your help! Regards, Cardinal

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  • ASP.NET MVC 2 - user defined database connection.

    - by J Harley
    Hello, I am looking to port my very basic DBMS software from classic ASP to ASP.net - however the user would need to input the connection details in order to connect to their specific DBMS server. Is this at all possible with ASP.NET MVC (very similar to DSN-less connections in ASP). Cheers, Joel

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  • GUI wxHaskell database table in grid

    - by snorlaks
    Hello, I'm writing GUI app in haskell. I use sqlite to gather data and want to use grid in wxHASKELL TO present data in app. Everything is all right but I want to have possibility to add rows from haskell app. I achieved that but when I refresh it It expands and covers other controls. To make things short how can I set maximum size of control, and if there are more rows in that grid then make scroll appear ? thanks for any help, bye

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  • Database EAV model, record listing as per search

    - by Shyam Sunder Verma
    I am building a dynamic application. I have three tables : ( EAV model style) 1: Items ( ItemId, ItemName) 2: Fields (FieldId, FieldName) 3: Field Values ( ItemID, FieldId, Value) Can you tell me how to write SINGLE query to get starting 20 records from ALL items where FieldId=4 is equal to TRUE. Expected Result : Columns = ItemID | Name | Field1 | Field2 | Field3 Each Row= ItemId | ItemName| Value1 | Value2 | Value3 Important concerns : 1: Number of fields per item are not known 2: I need one to write ONE query. 3: Query will be running on 100K records, so performance is concern. 4: I am using MySQL 5.0, so need solution for MYSQL Should I denormalize the tables if above query is not possible at all ? Any advice ?

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  • Adding to database with multiple text boxes

    - by kira423
    What I am trying to do with this script is allow users to update a url for their websites, and since each user isn't going to have the same amount of websites is is hard for me to just add $_POST['website'] for each of these. Here is the script <?php include("config.php"); include("header.php"); include("functions.php"); if(!isset($_SESSION['username']) && !isset($_SESSION['password'])){ header("Location: pubs.php"); } $getmember = mysql_query("SELECT * FROM `publishers` WHERE username = '".$_SESSION['username']."'"); $info = mysql_fetch_array($getmember); $getsites = mysql_query("SELECT * FROM `websites` WHERE publisher = '".$info['username']."'"); $postback = $_POST['website']; $webname = $_POST['webid']; if($_POST['submit']){ var_dump( $_POST['website'] ); $update = mysql_query("UPDATE `websites` SET `postback` = '$postback' WHERE name = '$webname'"); } print" <div id='center'> <span id='tools_lander'><a href='export.php'>Export Campaigns</a></span> <div id='calendar_holder'> <h3>Please define a postback for each of your websites below. The following variables should be used when creating your postback.<br /> cid = Campaign ID<br /> sid = Sub ID<br /> rate = Campaign Rate<br /> status = Status of Lead. 1 means payable 2 mean reversed<br /> A sample postback URL would be <br /> http://www.example.com/postback.php?cid=#cid&sid=#sid&rate=#rate&status=#status</h3> <table class='balances' align='center'> <form method='POST' action=''>"; while($website = mysql_fetch_array($getsites)){ print" <tr> <input type ='hidden' name='webid' value='".$website['id']."' /> <td style='font-weight:bold;'>".$website['name']."'s Postback:</td> <td><input type='text' style='width:400px;' name='website[]' value='".$website['postback']."' /></td> </tr>"; } print" <td style='float:right;position:relative;left:150px;'><input type='submit' name='submit' style='font-size:15px;height:30px;width:100px;' value='Submit' /></td> </form> </table> </div>"; include("footer.php"); ?> What I am attempting to do insert the what is inputted in the text boxes to their corresponding websites, and I cannot think of any other way to do it, and this obviously does not works and returns a notice stating Array to string conversion If there is a more logical way to do this please let me know.

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  • Sybase ODBC connection String with .net

    - by nitinkhanna
    Hi, I am having SYBASE 12.5 install on my server as well as my PC, I am unable to get the correct connection string. I have used the connectionstrings.com but unable to get the correct one. After runnig and making the connection Driver={Sybase ASE ODBC Driver};srvr=server_name;database=database_name;UID=user_name;PWD=pass; and some other combination of thic connection string I am getting the Datasource ="" Driver ="" DataBase="" ServerVersion = Invalid Operation. Connection is closed What am I suppose to correct in that. Please help. Thanks

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  • In Oracle 10g, how do I see tables in schemes other than system

    - by Yasir Arsanukaev
    In the hr schema there's a table emloyees, I can query data from it specifying it implicitly SELECT count(*) FROM hr.employees while logged in as system, but when I navigate to Home-Object Browser in the browser I can't see the table employees and other tables in other schemas. Can I manage tables in schemas other than system while logged in as system? Maybe there's some setting which enables me to group tables by schema. My Oracle Database version is 10.2.0.1 Express Edition. IIRC I could see all tables in Oracle Database 10.1.x.y. Thanks.

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  • Display database content which is last inserted using last inserted ID

    - by user2330772
    What i am doing is i am displaying last inserted data when form data is submitted,the form is multipart/form-data. I am getting this form data using jquery,here i am sending this data to php file using Ajax POST.In that php file i am inserting that data in db table..where i am getting the id of inserted data..on success of Ajax call i am sending that id to another PHP file..where using that id i am displaying the last inserted data... My form is: <form method="post" enctype="multipart/form-data" name="upload_form" id="data"> <select id="sel"> <option>Select the Project Stream</option> <option value="1">Computer Science</option> <option value="2">Mechanical</option> <option value="3">IT</option> <option value="4">Web Development</option> <option value="5">MCA</option> <option value="6">Civil</option> </select><br /> <input type="text" id="title" placeholder="Project Title"/><br /> <input type="text" id="vurl" placeholder="If You have any video about project write your video url path here" style="width:435px;"/><br /> <textarea id="prjdesc" name="prjdesc" rows="20" cols="80" style="border-style:groove;box-shadow: 10px 10px 10px 10px #888888;"placeholder="Please describe Your Project"></textarea> <label for="file">Filename:</label> <input type="file" name="file" id="file"/><br /> <button>Submit</button> </form> My js file: $("form#data").submit(function() { alert("update"); var sid=$("#sel").val(); alert(sid); var ttle = $("#title").val(); alert(ttle); var text = $("#prjdesc").val(); var vurl = $("#vurl").val(); /*var dataString = 'param='+text+'&param1='+vurl+'&param2='+ttle+'&param3='+id;*/ var formData = new FormData($(this)[0]); formData.append('param',text); formData.append('param1',vurl); formData.append('param2',ttle ); formData.append('param3',sid ); $.ajax({ type:'POST', data:formData, url:'insert.php', success:function(id) { alert(id); window.location ="another.php?id="+id; }, cache: false, contentType: false, processData: false }); return false; }); insert.php: <?php print_r($_FILES); $desc = $_POST['param']; echo $desc; $video = $_POST['param1']; echo $video ; $title = $_POST['param2']; echo $title; $tech_id=$_POST['param3']; echo $tech_id; $host="localhost"; $username="root"; $password=""; $db_name="geny"; $tbl_name="project_details"; mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select DB"); $allowedExts = array("gif", "jpeg", "jpg", "png"); $extension = end(explode(".", $_FILES["file"]["name"])); $url_dir = "C:/wamp/www/WebsiteTemplate4/upload/"; if ((($_FILES["file"]["type"] == "image/gif") || ($_FILES["file"]["type"] == "image/jpeg") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/pjpeg") || ($_FILES["file"]["type"] == "image/x-png") || ($_FILES["file"]["type"] == "image/png")) && ($_FILES["file"]["size"] < 50000) && in_array($extension, $allowedExts)) { if ($_FILES["file"]["error"] > 0) { echo "Return Code: " . $_FILES["file"]["error"] . "<br>"; } else { if (file_exists($url_dir . $_FILES["file"]["name"])) { echo $_FILES["file"]["name"] . " already exists. "; } else { move_uploaded_file($_FILES["file"]["tmp_name"],$url_dir. $_FILES["file"]["name"]); // echo "Stored in: " . "upload/" . $_FILES["file"]["name"]; $tmp = "C:/wamp/www/WebsiteTemplate4/upload/" . $_FILES["file"]["name"]; $sql="INSERT INTO $tbl_name (title, content, img_path, video_url, project_tech_Id) VALUES ('$title','$desc','$tmp','$video','$tech_id')"; if(mysql_query($sql)) { echo mysql_insert_id(); } else { echo "Cannot Insert"; } } } } else { echo "Invalid file"; } ?> another.php: <?php $temp=$_GET['id']; echo $temp; $host="localhost"; $username="root"; $password=""; $db_name="geny"; $tbl_name="project_details"; mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select DB"); $query = mysql_query("SELECT content FROM project_details WHERE id=". $temp); if (!$query) { echo 'Could not run query: ' . mysql_error(); exit; } $row = mysql_fetch_row($query); echo "<div id='uprjct' style='background:#336699;'> <p>$row[0]</p> </div>"; ?> but the ID what i am returning in insert.php containg array of elements...i dont want all these thing i want only ID(which is number).. please tell me what is wrong in my code...

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  • SelectList in Asp-mvc and data from the database

    - by George
    Hello guys. I'm having some troubles with SelectList in ASP.MVC. Here is the issue: I have a Create View and begind a ViewModel model. The page load just fine (GET verb). But when posting, something happens, and my model is considered invalid, and it cannot insert. Here's what i've tried so far. public class DefinitionFormViewModel { private Repository<Category> categoryRepository = new Repository<Category>(); public Definition ViewDefinition { get; private set; } public SelectList Categories { get; private set; } public DefinitionFormViewModel(Definition def) { ViewDefinition = def; // here i wanted to place it directly, like shown in NerdDinner Tutorial // new SelectList(categoryRepository.All(),ViewDefinition.Category); Categories = new SelectList(categoryRepository.All(), "CategoryId", "CategoryName", ViewDefinition.CategoryId); } } // pageview which inherits DefinitionFormViewModel <div class=editor-field"> <%= Html.DropDownList("Category",Model.Categories) %> <%= Html.ValidationMessageFor(model => Model.ViewDefinition.Category) %> </div> // controller methods [Authorize] public ActionResult Create() { Definition definition = new Definition(); return View(new DefinitionFormViewModel(definition)); } [AcceptVerbs(HttpVerbs.Post), Authorize] public ActionResult Create(int id,Definition definition) { Term term = termRepository.SingleOrDefault(t => t.TermId == id); if (term == null) { return View("NotFound", new NotFoundModel("Termo não encontrado", "Termo não encontrado", "Nos desculpe, mas não conseguimos encontrar o termo solicitado.", "Indíce de Termos", "Index", "Term")); } else { if (ModelState.IsValid) { try { definition.TermId = term.TermId; definition.ResponsibleUser = User.Identity.Name; UpdateModel(definition); term.Definitions.Add(definition); termRepository.SaveAll(); return RedirectToAction("Details", "Term", new { id = term.TermId }); } catch (System.Data.SqlClient.SqlException sqlEx) { ModelState.AddModelError("DatabaseError", "Houve um erro na inserção desta nova definição"); } catch { foreach (RuleViolation rv in definition.GetRuleViolations()) { ModelState.AddModelError(rv.PropertyName, rv.ErrorMessage); } } } } return View(new DefinitionFormViewModel(definition)); } I'm sorry about the long post, but I cant figure this out. I got no graphic errors or exceptions. My execution terminates in if (ModelState.IsValid). Thanks for your time George

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  • Select multiple records from sql database table in a master-detail scenario

    - by Trex
    Hello, I have two tables in a master-detail relationship. The structure is more or less as follows: Master table: MasterID, DetailID, date, ... masterID1, detailID1, 2010/5/1, .... masterID2, detailID1, 2008/6/14, ... masterID3, detailID1, 2009/5/25, ... masterID4, detailID2, 2008/7/24, ... masterID5, detailID2, 2010/4/1, ... masterID6, detailID4, 2008/9/16, ... Details table: DetailID, ... detailID1, ... detailID2, ... detailID3, ... detailID4, ... I need to get all the records from the details table plus the LAST record from the master table (last by the date in the master table). Like this: detailID1, masterID1, 2010/5/1, .... detailID2, masterID5, 2010/4/1, ... detailID3, null, null, ... detailID4, masterID6, 2008/9/16, ... I have no idea how to do this. Can anybody help me? Thanks a lot. Jan

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