Class: Import

Inherits:
Object
  • Object
show all
Defined in:
app/models/import.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, file) ⇒ Import

Returns a new instance of Import.



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# File 'app/models/import.rb', line 6

def initialize(klass, file)
  @klass = klass
  @file = file

  validate_import

  # TODO: initialize import job instead of doing import here
  perform!
end

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'app/models/import.rb', line 4

def file
  @file
end

#klass ⇒ Object (readonly)

Returns the value of attribute klass.



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# File 'app/models/import.rb', line 4

def klass
  @klass
end

Instance Method Details

#perform! ⇒ Object 



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# File 'app/models/import.rb', line 16

def perform!
  # TODO: this creates a new object per CSV row. It may be worth optimizing further to use
  # something like this approach to do only a single insert.
  # https://gist.github.com/jackrg/76ade1724bd816292e4e
  CSV.foreach(file.tempfile,
              headers: true,
              encoding:'iso-8859-1:utf-8',
              skip_blanks: true,
              skip_lines: /^(?:,\s*)+$/,
              header_converters: -> (f) { f.strip },
              converters: -> (f) { f ? f.strip : nil } ) do |row|
    attrs = row.to_h.compact
    klass.find_or_create_by!(attrs)
  end
end