Answer Posted / arpita patel

form_for and form_tag both are used to submit the form in
ruby on rails.
but the way of handling objects related to model is
different.

form_for:

you should use form_for for a specific model i.e while
crating an new row in database. form_for will perform the
standard http post which is having fields related to active
record objects.

here is the example for using form_for in ruby on rails:

<% form_for :user, @user, :url => { :action => "update" }
do |f| %>

then in here you can use the f object to create input
field.

First name: <%= f.text_field :firstname %>
Last name : <%= f.text_field :lastname %>
Biography : <%= f.text_area :biography %>

<% end %>

form_tag:

form_tag just creates an form as an normal form. form_for
will perform the standard http post without any model
backed and has normal fields. this is used mainly when
specific things need to be submitted via form


here is the example for using form_tag in ruby on rails:

<% form_tag '/posts' do -%>
<%= text_field_tag "post", "firstname" %>
<% end -%>

what is the purpose of the resources method in the code snippet below?

872

---

If you want to set up a one-to-one relationship between two models, you'll need to add belongs_to to one, and has_one to the other. How do you know which is which?

835

---

Explain the controller in rails?

911

---

What are float, dig and max?

1015

---

how can you declare a block in Ruby?

947

---

Why ruby on rails is used for?

872

---

Explain Get and post method?

925

---

What is the purpose of require_relative in ruby?

869

---

What is cross-site request forgery (csrf)? How is rails protected against it?

997

---

How many types of variables are available in ruby class?

880

---

How are observers and callbacks different from each other?

781

---

what is different between activerecord::relation's count, length and size methods?

900

---

what are helpers and how to use helpers in ror?

885

---

Explain me what is the function of orm in ruby on rails?

772

---

Explain me what is the difference between concern and application_controller.rb in ruby on rails?

801

---