Importing CSV data into Rails app, using something other then the association “id”

Question

I am trying to import a few CSV files into my rails app. I learned and managed to import tables into Models without association.

Now i have managed to import the da

Answer 1

A shipment_type is a ruby object, you want to send a string.

If you are needing to import relationships, add methods on the Port model like so

class Port < ApplicationRecord

  def shipment_type_name
    shipment_type.try(:name)
  end

  def shipment_type_name=(name)
    self.shipment_type = ShipmentType.where(:name => name).first_or_create
  end

  def country_country_code
    country.try(:country_code)
  end

  def country_country_code=(code)
    self.country = Country.where(:country_code => code).first
  end


end

Then in the CSV you'd send a shipment_type_name and country_country_code attributes.

You would do something similar to other relationships.

Answer 2

You may want to use this gem for importing CSV: https://github.com/michaelnera/active_record_importer

It's easy to use.

Answer 3

Thank you everyone for the help. Below is what ended up working for me. The biggest issue i was getting was Origin and Destination. There is only one Port table, which includes a list of the Ports. Ports are used for both Origin and Destination.

class Rate < ApplicationRecord

  def self.import(file)
    CSV.foreach(file.path, headers: true) do |row|
      rate = find_by_id(row["id"])
      Rate.create! row.to_hash
    end
  end

  belongs_to :origin, :class_name => 'Port'
  belongs_to :destination, :class_name => 'Port'
  belongs_to :carrier
  belongs_to :shipment_category
  belongs_to :unit_of_measure
  has_many :additional_items

# associatiing Origin and Destination Port Code
def origin_port_code
  origin.try(:port_code)
end

def origin_port_code=(port_code)
  self.origin = Port.where(:port_code => port_code).first
end

def destination_port_code
  destination.try(:port_code)
end

def destination_port_code=(port_code)
  self.destination = Port.where(:port_code => port_code).first
end

# associating carrier name
  def carrier_name
    carrier_name.try(:name)
    #code
  end
  def carrier_name=(name)
    self.carrier = Carrier.where(:name => name).first
    #code
  end


# associating Shipment Category Name
  def shipment_category_name
    shipment_category.try(:name)
  end

  def shipment_category_name=(name)
    self.shipment_category = ShipmentCategory.where(:name => name).first
  end



  # associating unit_of_measure name
  def unit_of_measure_name
    unit_of_measure.try(:name)
    #code
  end
  def unit_of_measure_name=(name)
    self.unit_of_measure = UnitOfMeasure.where(:name => name).first
    #code
  end


end