Get name from table has many , belong to relationship

Hi Guys

I have a table with

Relationship

has many
belong to

Employee table

employee id addressid
12 12
13 13

i need to access addressid data from address table

please guide me


Karthik.k
Mobile - +91-9894991640

Hi Karthik,
Firstly I should say you should be more specific than that, the info is
not
very clear.
Secondly I will try to help you based on what I understand of your
question.

Say you create a new employee this way :
@employee = Employee.new(params[:employee])

You could do this in the controller create method :
@employee.address = Address.find() #find the address you want.

Now I will also advice you, in the new.html.erb form where your filling
the
Employee info, you could have a select drop down with Address data and
depending on what you select, you would then automatically assign the
address.

example:)

employee_controller.rb

def new
@addresses = Address.all
end

employee/new.html.erb

<%= f.select :address_id, @addresses.collect {|address| [address.text,
address.id]}

the above will generate the needed select drop down for selecting the
address, the values would be the id whereas the text of the options
would be
address.text assuming that text field is the field of address which
holds
the address string.

Hope it helps.

Thanks & Regards,
Dhruva S…

Stephen
Leacockhttp://www.brainyquote.com/quotes/authors/s/stephen_leacock.html

  • “I detest life-insurance agents: they always argue that I shall some
    day
    die, which is not so.”

I’d argue for a person table (employees are people too), an address
table, and a full join table. A person can have many addresses, and an
address can have many people. People move, and you may want to keep
history on a person’s past addresses (especially if there’s a payroll or
tax implication).

Person
id, first_name, last_name, etc, etc
has_many :residences
has_many :addresses, :through => :residences

Address
id, line_1, line_2, city, state, postal_code, etc, etc
has_many :residences
has_many :people, :through => :residences

Residences
person_id
address_id
additional fields, perhaps start_date, end_date, and anything else that
might be related to an instance of this person at this address.
belongs_to :person
belongs_to :address

Maintenance of residences becomes a bit more involved (do you delete the
residence, or just end it - which gets to that residence history
question), but the flexibility might pay off later…

Showing field values is as simple as

@person.addresses.each do |address|
address.city
address.state
address.postal_code

or

@address.people.each do |person|
person.first_name
person.last_name

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