The controller will ask the model to retrieve the first user from the database. Then it will store it in an instance variable called user:. If we would like to display the first three user attributes in a view, we would use HTML and erb code like the following:. Remember: The app will render the result of executing code inside expression tags. The difference is that the application won't render the result of executing the code. They are frequent on ruby expressions. Imagine you are building a view to display all the users in your database.
The controller will ask the model to retrieve all the users from the database 10 total. Then it will store them inside an instance variable called users. You have two ways to do this: The efficient one and the inefficient one. A very inefficient way to display a list of users would be building a view like the following one:.
Imagine there are not 10 users but thousands of them. The code inside the comment tags gets ignored at the moment of building the template. Let me tell you something great: Mastering erb will be a matter of minutes if you are already good with Ruby and HTML.
Otherwise, It will be a matter of hours practicing until you get it. If you plan to become a professional Rails developer, you will practice this skill a lot, so don't worry. You will master it sooner or later. Important: Avoid using logic heavy erb code in your views. For those cases, it is always better to create a helper method to deal with that.
Please follow me on Twitter and connect on LinkedIn. It's undefined. Why not just replicate your production environment locally? A webserver is not very resource hungry and it can help resolve some ecosystem configuration issues like you're seeing here. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Collectives on Stack Overflow. Learn more. Asked 11 years, 1 month ago. Active 4 years, 8 months ago. Viewed 12k times. David Moles Harry Wood Harry Wood 1, 2 2 gold badges 20 20 silver badges 43 43 bronze badges. Add a comment. Active Oldest Votes. I'm not sure about Rails 2. Jim Schubert Jim Schubert Nimesh Nikum Nimesh Nikum 1, 12 12 silver badges 16 16 bronze badges.
NoelProf NoelProf 7 7 silver badges 7 7 bronze badges. That gives me a filesystem path. I need relative or absolute URL.
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