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• How to count ocurrences in 1 to many relationship in gorm - grails

  - by xain

  Hi, I have 2 domain classes class A { .... static hasMany = [bs:B] } class B { int code .... } How can I list the number of ocurrences of all codes in B in all the A table? Something like b.each { thisb -> int ocurrences = A.bs.findAll{it == thisb}.size() ... } Thanks

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• How to model a mutually exclusive relationship in sql server

  - by littlechris

  Hi, I have to add functionality to an existing application and I've run into a data situation that I'm not sure how to model. I am being restricted to the creation of new tables and code. If I need to alter the existing structure I think my client may reject the proposal..although if its the only way to get it right this is what I will have to do. I have an Item table that can me link to any number of tables, and these tables may increase over time. The Item can only me linked to one other table, but the record in the other table may have many items linked to it. Examples of the tables/entities being linked to are "Person", "Vehicle", "Building", "Office". These are all separate tables. Example of Items are "Pen", "Stapler", "Cushion", "Tyre", "A4 Paper", "Plastic Bag", "Poster", "Decoration" For instance a "Poster" may be allocated to a "Person" or "Office" or "Building". In the future if they add a "Conference Room" table it may also be added to that. My intital thoughts are: Item { ID, Name } LinkedItem { ItemID, LinkedToTableName, LinkedToID } The LinkedToTableName field will then allow me to identify the correct table to link to in my code. I'm not overly happy with this solution, but I can't quite think of anything else. Please help! :) Thanks!

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• Displaying a To-Many Relationship in a Table View

  - by DanF

  I've got an application I've been working on. There are projects and employees, projects can have several employees, employees can work on several projects. Right now I want selecting a project to display which employees are related to it, and allows me to add employees I select from another full-roster list. Somehow, this has proven more complicated, because (at least for now), selecting different projects still displays the same list of employees, as if all employees who'd been assigned to any project, belong to all of them. What part of Master-Detail am I missing?

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• Exchange Management Console Listing Extra Servers

  - by Zak G

  I recently decommissioned an Old Exchange 2003 server. Prior to the decommissioning, the environment consisted of 2 EXCH 2010 and that one EXCH 2003 server. I went through all the steps listed in Microsoft documents and online in how to remove the server completely (pruning the AD and all that jazz). When I go to Exchange Management Console it still lists 3 total servers in the "Server Summary" column in the Organizational Health tab. When I click manage servers, it only lists the 2 EXCH 2010 servers. I am aware this is only a cosmetic issue but I would appreciate it if anyone can share some advice on how to fix the issue.

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• "Exchange Management Console" 2007 can't connect to Active directory on load : get-ExchangeServer

  - by Dragouf

  Since a little time I can't use Exchange Management Console on an exchange 2007 server because of a message which tell me that get-ExchangeServer return that active directory of my server is available. My config is : Windows server 2008 sp2 wit roles : DNS IIS Active Directory RAS and Exchange server 2007. Here is a screenshot of the error message (I run windows server 2008 french edition sorry) : in english : The following error(s) were reported while loading topology information: get-ExchangeServer Failed Error: Active Directory server <theserver> is not available. Error message: A local error occurred. A local error occurred. get-UMServer Failed Error: Active Directory server <theserver> is not available. Error message: A local error occurred. A local error occurred. Anyone know from where this problem is comming and how to resolve it ?

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• TSQL, select values from large many-to-many relationship

  - by eugeneK

  I have two tables Publishers and Campaigns, both have similar many-to-many relationships with Countries,Regions,Languages and Categories. more info Publisher2Categories has publisherID and categoryID which are foreign keys to publisherID in Publishers and categoryID in Categories which are identity columns. On other side i have Campaigns2Categories with campaignID and categoryID columns which are foreign keys to campaignID in Campaigns and categoryID in Categories which again are identities. Same goes for Regions, Languages and Countries relationships I pass to query certain publisherID and want to get campaignIDs of Campaigns that have at least one equal to Publisher value from regions, countries, language or categories thanks

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• Generate table relationship diagram from existing schema (SQL Server)

  - by Nick

  Is there a tool around that would produce a diagram showing existing tables and their relationships given a connection to a database or by any other means? This is for SQL Server 2008 Express Edition.

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• CakePHP hasMany relationship with multiple columns

  - by Muhammad Yasir

  Hi, I am using CakePHP framework to build a web application. The simplest form of my problem is this: I have a users table and a messages table with corresponding models. Messages are sent from a user to another user. So messages table has columns from_id and to_id in it, both referencing to id of users. I am able to link Message model to User model by using $belongsTo but I am unable to link User model with Message model (in reverse direction) by using $hasMany in the same manner. var $hasMany = array( 'From' => array( 'className' => 'Message', 'foreignKey' => 'from_id', 'dependent' => false, 'conditions' => '', 'fields' => '', 'order' => '', 'limit' => '', 'offset' => '', 'exclusive' => '', 'finderQuery' => '', 'counterQuery' => '' ), 'To' => array( 'className' => 'Message', 'foreignKey' => 'to_id', 'dependent' => false, 'conditions' => '', 'fields' => '', 'order' => '', 'limit' => '', 'offset' => '', 'exclusive' => '', 'finderQuery' => '', 'counterQuery' => '' ) ); What can do here? Any ideas? Thanks for any help.

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• android : customer List Adatper + ArrayList

  - by Ram

  Team, Could you please help me debug the issue? ActivityAdapter activityAdapter = new ActivityAdapter(this,activityList); Log.d("list", "List Display - 1"); setListAdapter( activityAdapter ); Log.d("List", "list done"); It's throwing exception at the time of setListAdapter, 05-01 16:59:15.996: WARN/dalvikvm(251): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 05-01 16:59:15.996: ERROR/AndroidRuntime(251): Uncaught handler: thread main exiting due to uncaught exception 05-01 16:59:16.204: ERROR/AndroidRuntime(251): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.antennasoftware.xml/com.antennasoftware.xml.XMLParsing}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2454) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2470) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.os.Handler.dispatchMessage(Handler.java:99) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.os.Looper.loop(Looper.java:123) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread.main(ActivityThread.java:4310) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at java.lang.reflect.Method.invokeNative(Native Method) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at java.lang.reflect.Method.invoke(Method.java:521) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at dalvik.system.NativeStart.main(Native Method) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ListActivity.onContentChanged(ListActivity.java:236) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:201) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.Activity.setContentView(Activity.java:1622) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at com.antennasoftware.xml.XMLParsing.onCreate(XMLParsing.java:36) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) 05-01 16:59:16.204: ERROR/AndroidRuntime(251): ... 11 more Thanks in advance

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• getting hasMany records of a HABTM relationship

  - by charliefarley321

  I have tables: categories HABTM sculptures hasMany images from the CategoriesController#find() produces an array like so: array( 'Category' => array( 'id' => '3', 'name' => 'Modern', ), 'Sculpture' => array( (int) 0 => array( 'id' => '25', 'name' => 'Ami', 'material' => 'Bronze', 'CategoriesSculpture' => array( 'id' => '18', 'category_id' => '3', 'sculpture_id' => '25' ) ), (int) 1 => array( 'id' => '26', 'name' => 'Charis', 'material' => 'Bronze', 'CategoriesSculpture' => array( 'id' => '19', 'category_id' => '3', 'sculpture_id' => '26' ) ) ) ) I'd like to be able to get the images related to sculpture in the array as well if this is possible?

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• Validations for a has_many/belongs_to relationship

  - by Craig Walker

  I have a Recipe model which has_many Ingredients (which in turn belongs_to Recipe). I want Ingredient to be existent dependent on Recipe; an Ingredient should never exist without a Recipe. I'm trying to enforce the presence of a valid Recipe ID in the Ingredient. I've been doing this with a validates :recipe, :presence => true (Rails 3) statement in Ingredient. This works fine if I save the Recipe before adding an Ingredient to it's ingredients collection. However, if I don't have explicit control over the saving (such as when I'm creating a Recipe and its Ingredients from a nested form) then I get an error: Ingredients recipe can't be blank I can get around this simply by dropping the presence validation on Ingredient.recipe. However, I don't particularly like this, as it means I'm working without a safety net. What is the best way to enforce existence-dependence in Rails? Things I'm considering (please comment on the wisdom of each): Adding a not-null constraint on the ingredients.recipe_id database column, and letting the database do the checking for me. A custom validation that somehow checks whether the Ingredient is in an unsaved recipe's ingredient collection (and thus can't have a recipe_id but is still considered valid).

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• Customer Display OR Pole Display

  - by nwaynge

  hi, I do also want to know how can i Display Text on Pole Display. I write the code with VB.net 2008. Sample Code that i write is : If SerialPort1.IsOpen = False Then SerialPort1.Open() SerialPort1.Write("\r\n" & RichTextBox1.Text & vbCr, 0, RichTextBox1.TextLength) System.Threading.Thread.Sleep(1000) If SerialPort1.IsOpen = True Then SerialPort1.Close() I got no errors but can't display on Pole Display. Please help me. Regards, Nway Nge

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• OpenAL device, buffer and context relationship

  - by Markus

  I'm trying to create an object oriented model to wrap OpenAL and have a little problem understanding the devices, buffers and contexts. From what I can see in the Programmer's Guide, there are multiple devices, each of which can have multiple contexts as well as multiple buffers. Each context has a listener, and the alListener*() functions all operate on the listener of the active context. (Meaning that I have to make another context active first if I wanted to change it's listener, if I got that right.) So far, so good. What irritates me though is that I need to pass a device to the alcCreateContext() function, but none to alGenBuffers(). How does this work then? When I open multiple devices, on which device are the buffers created? Are the buffers shared between all devices? What happens to the buffers if I close all open devices? (Or is there something I missed?)

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• ROR accepts_nested_attributes_for one to many relationship with selection

  - by bilash.saha

  I have two models Doctors and Questions like the follwong: Doctor Model class Doctor < ActiveRecord::Base has_many :questions has_many :brands accepts_nested_attributes_for :questions end Question model class Question < ActiveRecord::Base belongs_to :discipline belongs_to :doctor belongs_to :brand end Now you can clearly see that Doctor has many questions and brands and question belongs to doctor and brand.I want to add previously saved question to a doctor from doctors edit page. I want to remove them as well.How can I proceed ? I tried like : <%= form.fields_for :questions, question,:child_index => (question.new_record? ? "index_to_replace_with_js" : nil) do |question_form| %> <table> <tr> <td> <div class="label">Select Question</div> <%= question_form.collection_select :id, Question.all, :id, :title ,{:include_blank => true } %> </td> </tr> </table> but this doesnot works for me.Can you give me a solution with proper example ?

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• The Columns in table <table> do not match an existing primary key or unique constraint

  - by Sven

  I have 2 tables, Stores - storeId (int) and year (int(4)) both Primary Keys. fruit - fruitId - Primary Key and storeId. I need to create 1 to many relationship between the Store and Fruit (Foreign Key held within Fruit) how ever I always get shown the error - The Columns in table <table> do not match an existing primary key or unique constraint. The type's are both int and named the same. Any help would be appreciate in advance, many thanks.

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• Lambda Expressions and Memory Management

  - by Surya

  How do the Lambda Expressions / Closures in C++0x complicate the memory management in C++? Why do some people say that closures have no place in languages with manual memory management? Is there claim valid and if yes, what are the reasons behind it?

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• Inverse relationship of two variables

  - by Jam

  this one is maybe pretty stupid.. Or I am just exhausted or something, but I just cant seem to solve it.. Problem : two variables X and Y, value of Y is dependent on value of X. X can have values ranging from some value to some value (lets say from 0 to 250) and y can have different values (lets say from 0.1 to 1.0 or something..) - but it is inverse relatonship (what I mean is: if value of X is e.g. 250, then value of Y would be 0.1 and when X decreases up to 0, value of Y raises up to 1.0.. So how should I do it? lets say I have function: -- double computeValue (double X) { /computation/ return Y; } Also, is there some easy way to somehow make the scaling of the function not so linear? - For example when X raises, Y decreases slower at first but then more rapidly in the end.. (rly dont know how to say it but I hope you guys got it) Thanks in advance for this stupid question :/

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• How to create relationship between two tables with revisions using Entity Framework

  - by Chris Ridenour

  So I am in the process of redesigning a small database (and potentially a much larger one) but want to show the value of using revisions / history of the business objects. I am switching the data from Access to MSSQL 2008. I am having a lot of internal debate on what version of "revision history" to use in the design itself - and thought I had decided to add a "RevisionId" to all tables. With this design - adding a RevisionId to all tables we would like tracked - what would be the best way to create Navigational Properties and Relationships between two tables such as | Vendor | VendorContact | where a Vendor can have multiple contacts. The Contacts themselves will be under revision. Will it require custom extensions or am I over thinking this? Thanks in advance.

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• Possible relationship between PHP Mailer and Mailer-Daemon

  - by XGreen

  Hi, I am using the PHPMailer Class from a website which sends confirmation of the user ajax upload to my client. This uses the mail.myclient.com SMTP Host. This is the same SMTP Host that my client uses for his outlook to check his emails. This email from the website gets sent without errors although I have received two emails from my client regarding Mail delivery failed: returning message to sender for the same address I have used to send confirmation emails out from. Can these two issues be related? Do I need to provide more info? Thanks a bunch!

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• Matching between product and customer personal information

  - by Yanshof

  I writing some application that find ( according to some question ) information about some person ( lets say that the information are weight, hight and age of the person ). In the other hand i have product list ( can be very big one ) and according to the product information i need to find the best matching between the person information and the product ( the product information that i have are water part, nitrogen part and ext. ) I can't use flow chart algorithm or Breadth-first search because the number of the product is dynamically ( read the product list from DB ... )

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• JDO in Google App Engine: order of keys in unowned one-to-many relationship

  - by Kel

  I'm implementing web application with JDO in Google App Engine. According to documentation, in owned one-to-many relationships, order of elements in "owner" object collection is determined either by automatically created index field, or by information given in explicit ordering clause. For example: @PersistenceCapable public class Person { // ... @Order(extensions = @Extension(vendorName="datanucleus", key="list-ordering", value="country asc, city asc")) private List<ContactInfo> contacts = new List<ContactInfo>(); In unowned relationships, "owner" object contains collection of keys of "nested" objects, for example: @PersistenceCapable public class Author { // ... @Persistent private List<Key> books; Is order of keys preserved, if I use List<Key> collection in "owner" object for storing keys of "nested" elements? I could not find answer neither in JDO relationships article, nor in Data Classes article :(

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• 'Locale' configuration and its relationship with Windows API

  - by The Kaykay

  Can the locale configuration of a system OR the keyboard type configuration of that system in anyway affect which API is called at the Kernel level? To be specific, if a program is invoking 'CreateFile()' API then the windows API documentation says that the call gets delegated to either CreateFileA or CreateFileW. If that program is being run on a system present in China with a Chinese Keyboard then which of the two functions will be called?

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• Oracle PeopleSoft Mobile Inventory Management, une solution mobile pour améliorer précision des stocks et productivité des utilisateurs

  Oracle PeopleSoft Mobile Inventory Management Une application mobile pour améliorer la précision des stocks et la productivité des utilisateurs Oracle possède déjà un portefeuille très complet de solutions de gestion des stocks et de solutions mobiles. Ce portefeuille s'enrichit encore plus aujourd'hui avec une nouvelle solution : Oracle PeopleSoft Mobile Inventory Management. Il s'agit en fait d'une nouvelle application de la suite Oracle PeopleSoft Enterprise Supply Chain Management qui permet d'améliorer la précision des stocks et la productivité des opérateurs en automatisant les transactions mobiles de gestion pour les utilisateurs de terminaux mobiles équipés de Microsoft W...

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• Why are there so many DB management Systems ?

  - by mr.bio

  Hi there , i always asked myself. Why are there so many DB management systems? I am not an DB expert and i never thought about using another DB than mysql. Programming languages offer different paradigms, so there it makes sense to choose a specific language for your purpose. What are factors to choose a specific DB management system ?

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• Doctrine2 - relationship

  - by Filip Golonka

  I'm developing an application, which is looking for optimal route and timetable in public transport. I have some experience about Doctrine1, but it's my first time with Doctrine2. There is soem new fields to describe relations (mappedBy and inversedBy) and also some new ways of mapping. I have following code: $query = $this->em->createQuery("SELECT partial cls.{stop}, partial t.{arriveTime, departureTime} FROM \Entities\Timetable t JOIN t.ride r JOIN t.carrierLineStop cls WHERE t.departureTime>=:time AND r.idCarrierLine=:carrierLine AND (cls.idStop=:firstStop OR cls.idStop=:lastStop)"); $query->setParameters(array( 'time' => $time, 'carrierLine' => $path->getLine(), 'firstStop' => $path->getFirstStop(), 'lastStop' => $path->getLastStop() )); When I try to execute that script I've got an error: [Semantical Error] line 0, col 24 near '}, partial t.{arriveTime,': Error: There is no mapped field named 'stop' on class Entities\CarrierLineStop. Mapping files: Entities\CarrierLineStop: type: entity table: carrier_line_stop fields: idCarrierLineStop: id: true type: integer unsigned: false nullable: false column: id_carrier_line_stop generator: strategy: IDENTITY nextStop: type: integer unsigned: false nullable: true column: next_stop manyToOne: idCarrierLine: targetEntity: Entities\CarrierLine cascade: { } mappedBy: null inversedBy: null joinColumns: id_carrier_line: referencedColumnName: id_carrier_line orphanRemoval: false stop: column: id_stop targetEntity: Entities\Stop cascade: { } mappedBy: null inversedBy: carrierLineStop joinColumns: id_stop: referencedColumnName: id_stop orphanRemoval: false lifecycleCallbacks: { } - Entities\Stop: type: entity table: stop fields: idStop: id: true type: integer unsigned: false nullable: false column: id_stop generator: strategy: IDENTITY name: type: string length: 45 fixed: false nullable: true miejscowosc: type: string length: 45 fixed: false nullable: true latitude: type: decimal nullable: true longitude: type: decimal nullable: true oneToMany: carrierLineStop: targetEntity: Entities\CarrierLineStop cascade: { } mappedBy: stop inversedBy: null joinColumns: id_stop: referencedColumnName: id_stop orphanRemoval: false lifecycleCallbacks: { } I have no idea about where the problem is...

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