I am wondering what jhipster entities are exactly?
What if I just want to create a new page/view without any database entry and relationship? For example: the about page, do I have to use the entity generator in order to create it? What are the benefits of it?
jhipster entity tutorial
Regards
redyar
Entities are typically objects that are backed by a database table. With JHipster, you can generate entities (and their associated screens) using Yeoman.
For an about page, or any other page, you can author them by hand. You don't need to use a generator. JHipster merely provides its entity sub-generator as a convenience for you.
You can also use the Yeoman generator for AngularJS to generate basic scaffolding.
http://yeoman.io
Immagine to build a website of e-commerce. That website contains users, sensible data informations, details about sellers and other things. You can save a lot of time creating it with Jhipster because it automatically create Objects class that represents database's tables, RESTful web services to manage them and the frontend view with Angular, CSS and HTML (all generated automatically). The objects that represent database's tables are entities.
With entities you can do CRUD queries on database using Java objects and Java methods with Spring framework. You can do queries by calling java methods. Thats all! After some practice it's really easy to use.
With that generator you don't have to configure relationships, constraints or things like that. Jhipster does that for you!
If you need a web application that does not use a database you don't need to use a generator like this, in my opinion.
I took the right Matt Raible's answer trying to give you more informations about entities. I hope to be helpful!
Have a nice day!
Related
Does anybody know whether there is a way to use default OpenIddict storage functionality in a project which doesn't use Entity Framework and has not empty DB?
I'm trying to integrate Openiddict server to my Web App. The app has a DB, but communication with it is done using classic ADO.Net. I tried to find a similar example in the openiddict-samples repository but unfortunately without result.
I know that I can implement my own TokenStore, ApplicationStore etc. and register them via extensions for OpenIddictCoreBuilder but I'd like to use the default implementations in case it's possible to do that with not empty DB and without EF or with EF but for Openiddict functionality only. My DB is quite big and it's not an easy task to migrate it to EF.
I tried to use code from existing examples but those didn't work in my case. What I found out is that it works with empty DB only, otherwise OpenIddict tables are not created.
So I would very appreciate for any advice or link to example which I should investigate more carefully. So to say make OpenIddict to create its tables automatically, under the hood.
P.S.: I of course can copy those tables from examples and include scripts for their creation in my app, but I'd like to use the built-in functionality as much as possible.
OpenIddict version: 3.1.1
It seems that for now there is no a built-in functionality to achieve the wanted behavior. The only way is to create own Stores and StoreResolvers for OpenIddict and migrate tables creation to any suitable solution: a set of sql scripts, some kind of migration (e.g. FluentMigration), etc.
For now OpenIddict out of the box supports EF and Mongo only. This implementations can be considered as examples for implementation of Stores and StoreResolvers.
Hi I'm on Symfony 5 and I'll like to generate php entities and update the scheme from a orm.xml file.
I think it worked before with doctrine:generate:entities command.
Any solution? Thanks in advance
The command doctrine:generate:entities was removed. The Doctrine ORM team does not encourage creating entities from existing schema and therefore deprecated that functionality in the ORM.
With the MakerBundle you can create entities, but as far as I know it won't create them from a schema, so you have to manually create each Entity, which admittedly can be annoying if you just want to generate them based on the existing schema anyway. Alternatively you can create a new "legacy" Symfony application (e.g. based on version 3.4 as this should still have the command), create the entities from the schema as described in the docs, and then copy the generated entities over into your project. You will likely also have to run a search & replace for AppBundle\Entity -> App\Entity.
My entire group is new to ASP.Net Core and I was the lucky one tasked with Authentication/Authorization. We have always used a DB first approach, and this is no different, we already have our DB all set up. The higher ups want to use our specific tables for all things Identity, but they also want to leverage the tools that ASP.Net Core gives.
This will be a multi-site app where there is one central database. Our current setup is close to what the scaffolding adds, but has some small differences.
I have read a ton of resources, but the vast majority all focus on the code first approach and I currently don't fully understand what I need and what is there for the code first approach. I have seen a couple of answers that recommend using the .ToTable and .Property inside of OnModelCreate. Is this the best option or am I better off creating my own stores and methods? I currently have a user model created and a store to go with it (based on this site). Is it best for me to try to expand that all the way out (don't full understand how to have it pull in roles and claims).
This is what our DB Schema currently looks like.
At this point we are creating our Roles and Claims via a db script. The only thing we will be using UI's for right now is a page that will let a site admin add users, and assign them roles, and any singular claims they need.
Any help or input would be greatly appreciated as I try to wrap my head around all of this. If I have left out any pertinent information please let me know. As I said with what I have now I can create a user and login, I just have no idea where to go from here (how to add roles and claims).
Here's how I think about it and the steps I would take to approach in solving this problem.
So Microsoft's implementation of Identity is an abstraction of the problem.
The Models that they provide and the Tables that are derived from them is their choice for the default implementation of the abstraction.
So essentially what you want to do is to plug in your models in to this abstraction.
To quickly generate these models from your database you might want to use scaffolding this will generate the DbContext and the Models, you will then have to configure the dbcontext to plug in your design.
And if you look at how you can create your own Identity Tables providing your own objects
here this can give you an idea of how to plug in your models/functions in to this abstraction.
You will most likely have to override the OnModelCreating method to configure the relationship of your tables.
Hi I'm trying to implement a class dbHelper to create a connection to an existing database on the phpmyadmin site.
I want to read and edit entries in the database. So my question is, how you would recommend to implement this in vaadin.
You're looking to create an application that supports create, read, update and delete (an acronym CRUD), which are the four basic functions of persistent storage.
Tutorials for creating CRUD applications with Vaadin has been done quite a few times. The article Creating CRUD UI with Vaadin as well as Spring Data JPA CRUD with Vaadin git repository provide a good step-by-step instructional. As #Andre recommended, using JPAContainers and Bean Item Containers are going to cut down the amount of code you need to write, so it would be worth your time planning your data models accordingly. If you have any specific questions on accessing data with JPA, or anything else please let me know!
I am new the Piranha. I want to make a new table in database like as site messages or newsletter form.
Can I make extension or what is the right way for Piranha?
Additional info: I am not using source code. I add piranha to my project from Nu-get.
just add entities/tables to your database using entity framework or whatever technology you like.
Remember that if you use an ORM you will can't have foreign key to tables in other contexts (Piranha) so you'll have to handle relationships with software triggers.
Regards
Håkan