Class: ActiveAdminImport::Importer

Inherits:
Object
  • Object
show all
Defined in:
lib/active_admin_import/importer.rb

Constant Summary collapse

OPTIONS = 
[
  :validate,
  :on_duplicate_key_update,
  :on_duplicate_key_ignore,
  :ignore,
  :timestamps,
  :before_import,
  :after_import,
  :before_batch_import,
  :after_batch_import,
  :headers_rewrites,
  :batch_size,
  :batch_transaction,
  :csv_options
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(resource, model, options) ⇒ Importer

Returns a new instance of Importer.



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# File 'lib/active_admin_import/importer.rb', line 24

def initialize(resource, model, options)
  @resource = resource
  @model = model
  @headers = model.respond_to?(:csv_headers) ? model.csv_headers : []
  assign_options(options)
end

Instance Attribute Details

#csv_lines ⇒ Object

Returns the value of attribute csv_lines.



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# File 'lib/active_admin_import/importer.rb', line 6

def csv_lines
  @csv_lines
end

#headers ⇒ Object

Returns the value of attribute headers.



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# File 'lib/active_admin_import/importer.rb', line 6

def headers
  @headers
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/active_admin_import/importer.rb', line 5

def model
  @model
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/active_admin_import/importer.rb', line 5

def options
  @options
end

#resource ⇒ Object (readonly)

Returns the value of attribute resource.



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# File 'lib/active_admin_import/importer.rb', line 5

def resource
  @resource
end

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/active_admin_import/importer.rb', line 5

def result
  @result
end

Instance Method Details

#batch_replace(header_key, options) ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 64

def batch_replace(header_key, options)
  index = header_index(header_key)
  csv_lines.map! do |line|
    from = line[index]
    line[index] = options[from] if options.key?(from)
    line
  end
end

#batch_slice_columns(slice_columns) ⇒ Object

Use this method when CSV file contains unnecessary columns

Example:

ActiveAdmin.register Post

active_admin_import before_batch_import: lambda { |importer|
                      importer.batch_slice_columns(['name', 'birthday'])
                    }

end



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# File 'lib/active_admin_import/importer.rb', line 83

def batch_slice_columns(slice_columns)
  # Only set @use_indexes for the first batch so that @use_indexes are in correct
  # position for subsequent batches
  unless defined?(@use_indexes)
    @use_indexes = []
    headers.values.each_with_index do |val, index|
      @use_indexes << index if val.in?(slice_columns)
    end
    return csv_lines if @use_indexes.empty?

    # slice CSV headers
    @headers = headers.to_a.values_at(*@use_indexes).to_h
  end

  # slice CSV values
  csv_lines.map! do |line|
    line.values_at(*@use_indexes)
  end
end

#cycle(lines) ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 39

def cycle(lines)
  @csv_lines = CSV.parse(lines.join, @csv_options)
  import_result.add(batch_import, lines.count)
end

#file ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 35

def file
  @model.file
end

#header_index(header_key) ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 107

def header_index(header_key)
  headers.values.index(header_key)
end

#import ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 44

def import
  run_callback(:before_import)
  process_file
  run_callback(:after_import)
  import_result
end

#import_options ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 51

def import_options
  @import_options ||= options.slice(
    :validate,
    :validate_uniqueness,
    :on_duplicate_key_update,
    :on_duplicate_key_ignore,
    :ignore,
    :timestamps,
    :batch_transaction,
    :batch_size
  )
end

#import_result ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 31

def import_result
  @import_result ||= ImportResult.new
end

#values_at(header_key) ⇒ Object 



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# File 'lib/active_admin_import/importer.rb', line 103

def values_at(header_key)
  csv_lines.collect { |line| line[header_index(header_key)] }.uniq
end