crud | 易学教程

Rails 3.1 remote requests submitting twice

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问题 I developed a Rails 3.1 application that consists of a 100% Ajax CRUD forms to input users and customers. I created two separate models, controllers, views etc. The views for each model contain jquery files for create edit update and destroy. The problem is when I perform any operation that performs a remote operation, it is called twice. I can confirm this happening in console view in firebug as well as output in WEBrick output. Can anyone assist in tracking down what happened here? What

Easiest Form validation library for PHP? [closed]

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I need a simple php library which can be used to easily pass rules and field names to, and then validation could be easily performed. There should also be an easy way to retrieve the errors. Any suggestions? I wrote a simple class of my own, combining some regexes i collected over the years with PHP's sanatize and filter functions. <? /** * Pork Formvalidator. validates fields by regexes and can sanatize them. Uses PHP filter_var built-in functions and extra regexes * @package pork */ /** * Pork.FormValidator * Validates arrays or properties by setting up simple arrays * * @package pork *

PHP and Microsoft Access database - Connection and CRUD

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问题 I have no experience with access. How to do update/insert/delete/select statement with and without $rs = new com(\"ADODB.RecordSet\"); ? 回答1: PDO If you want to interface with an MS Access database using PHP, PDO is available for you. <?php try { $pdo = new PDO("odbc:Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\accounts.mdb;Uid=Admin"); } catch (PDOException $e) { echo $e->getMessage(); } When using PDO, due to the unified interface for DB operations, you have the opportunity to make your

Single DAO & generic CRUD methods (JPA/Hibernate + Spring)

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问题 Following my previous question, DAO and Service layers (JPA/Hibernate + Spring), I decided to use just a single DAO for my data layer (at least at the beginning) in an application using JPA/Hibernate, Spring and Wicket. The use of generic CRUD methods was proposed, but I\'m not very sure how to implement this using JPA. Could you please give me an example or share a link regarding this? 回答1: Here is an example interface: public interface GenericDao<T, PK extends Serializable> { T create(T t);

Rails 4: before_filter vs. before_action

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问题 In rails >4.0.0 generators creates CRUD operations with before_action not before_filter . It seems to do the same thing. So what\'s the difference between these two? 回答1: As we can see in ActionController::Base , before_action is just a new syntax for before_filter . However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1 回答2: It is just syntax difference, in rails app there is CRUD, and seven actions basically by name index , new , create , show ,

Which HTTP methods match up to which CRUD methods?

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问题 In RESTful style programming, we should use HTTP methods as our building blocks. I\'m a little confused though which methods match up to the classic CRUD methods. GET/Read and DELETE/Delete are obvious enough. However, what is the difference between PUT/POST? Do they match one to one with Create and Update? 回答1: Create = PUT with a new URI POST to a base URI returning a newly created URI Read = GET Update = PUT with an existing URI Delete = DELETE PUT can map to both Create and Update

Any good ORM tools for Android development? [closed]

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问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . Anyone working on the Android (\'gPhone\') have or know of a place where I can find a good ORM tool for it? The code is written in

Entity Framework 4 - AddObject vs Attach

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问题 I have been working with Entity Framework 4 recently, and am slightly confused as to when to use ObjectSet.Attach, and ObjectSet.AddObject. From my understanding: Use \"Attach\" when an Entity already exists in the system Use \"AddObject\" when creating a brand new Entity So, if i\'m creating a new Person , i do this. var ctx = new MyEntities(); var newPerson = new Person { Name = \"Joe Bloggs\" }; ctx.Persons.AddObject(newPerson); ctx.SaveChanges(); If i\'m modifying an existing Person , i

Recommended JSF 2.0 CRUD frameworks [closed]

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问题 Can somebody recommend any framework to facilitate CRUD development in JSF 2.0? Aspects I value most: As lightweight as possible; limited dependencies on third party libraries Support for an evolving domain model Limited need for repetitive coding; support for scaffolding and/or metaannotations Any hints highly appreciated! Yours, J. 回答1: CRUD is indeed a piece of cake using JSF 2.0 provided standard facility: a @ViewScoped bean in combination with a <h:dataTable> basically already suffices.