persistence

问题 Need some help understanding if I'm on the right track here and exactly what I need to do. Hope someone can chime in. So I've got three tables, Job, Authorization, and Filter. Each Job must have one Authorization and one Filter. Of course, each Filter could be used by more than one job and the same goes for the Authorization. However, the Filters and Authorizations don't need to know what Jobs they are being used by. So that is a one to many relationship on the part of the Filters and

问题 17:03:38,942 WARN [org.hibernate.engine.jdbc.internal.JdbcServicesImpl] (MSC service thread 1-2) HHH000342: Could not obtain connection to query metadata : javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/studentDS I'm getting this error .... May I know .. what and why this occur and solution also 回答1: Hibernate is asking the DataSource you specified for a connection but the DataSource says it cannot return one. Beyond that, you have not

问题 I want to use JPA/JNDI, as my experience with Netbeans and Glassfish has been that I could configure database settings at the server and so I'd be able to publish to different servers without changing anything in the code or configuration. I don't really get what's wrong and paste my configuration here in the hope that you can help me with some advice. I successfully tried to get a database connection with this persistence unit: <persistence-unit name="primefaces-showcase" transaction-type=

问题 I am using Symfony (version 2.5.0-DEV) and the doctrine mongodb cookbook on http://symfony.com/doc/current/bundles/DoctrineMongoDBBundle/index.html. I am stuck at the moment trying to pass the value of a defined parameter into findOneByIndex. So if I do the following $script = $repository->findOneByIndex(1); it works perfectly. But if I do the following $script = $repository->findOneByIndex($user); it fails to search with the value of user. In routing.yml, I have this pattern: platform

问题 I'm on android and I have a problem with firebase. I was just checking my bandwitch with the cmd windows and I found out that if I add a new data to firebase, insteads of uploading the local caches it downloads all the data. I have the persistence enabled so it shouldn't be doing that. I have this configuration : So basically a key with article in it. I am just going to add one from the browser and load it on my phone. I run firebase database:profile on my cmd windows and load it on my phone

问题 There is a mapping exception for a particular entity. Cant figure out from where the problem is arising. I checked all the mappings 3 times from start to end. Still i am getting a Mapping Exception. Email to employee is mapped only once. but still it is reporting the error repeated mapping Error is: Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: com.cluster.entity.Email column: EMPLOYEE_ID (should be mapped with insert="false" update="false") at org

问题 I am new to Objectify and trying to implement One-to-Many relationship. I have entities Organization and entity Person . Organization has @Transient property List< Person > contactPeople . Class Person has @Parent property Key< Organization > organizationKey which I can set via setter. I'd like to persist contactPeople in @PrePersist handler of Organization. In order to do that I need to set parent key in Person. Wiki here says: "You can't update @Id or @Parent fields in a @PrePersist

问题 Background: I have a google site and I have been pulling information from a google spreadsheet containing the marks of my students, however I'd like to make it more dynamic so that they can request a report of all of their current marks whenever they'd like. In the script that I've written, students will enter a password, click a button and then their marks will be generated. Issue: From what I've read, when they click the button, the handler for the button causes the script to be re-run. The

问题 The purpose of this tooltip is to show, the format of the string which must be entered. The features I would like to achieve are: The tooltip should be shown when the user places the cursor in the textbox, i.e. when the user tabs into the control. The tooltip should update based on user input into the textbox (this can be achieved by binding). The tooltip must persist until the user tabs out of the control. I wanted to know if the standard tooltip as provided has configuration settings,

问题 I have and input type and it's value is set in flowScope. <input name="myItem" required="false" value="flowScope.myItem"/> I am creating a list of MyOtherItem and sending it to a controller method like this: <evaluate expression="myController.save(myOtherItemDataModel.selectedRows,myItem)" result="flowScope.myItem"/> Inside MyController I have method save in which I want to save multiple instances of myItem by getting data from myOtherItemList. public MyItem save(MyOtherItem[] myOtherItem