Class: Julia::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/julia/builder.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(collection, csv_options = Hash.new) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/julia/builder.rb', line 7

def initialize(collection, csv_options = Hash.new)
  @collection, @csv_options = collection, default_options.merge(csv_options)
end

Instance Attribute Details

#collection ⇒ Object (readonly)

Returns the value of attribute collection.



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# File 'lib/julia/builder.rb', line 5

def collection
  @collection
end

#csv_options ⇒ Object (readonly)

Returns the value of attribute csv_options.



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# File 'lib/julia/builder.rb', line 5

def csv_options
  @csv_options
end

Class Method Details

.build(collection, csv_options = Hash.new) ⇒ Object 



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# File 'lib/julia/builder.rb', line 42

def self.build(collection, csv_options = Hash.new)
  new(collection, csv_options).build
end

.column(keyname, action = nil, &block) ⇒ Object 



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# File 'lib/julia/builder.rb', line 18

def self.column(keyname, action = nil, &block)
  columns_config[keyname] = Action.new(keyname, action, &block)
end

.columns(*args) ⇒ Object 



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# File 'lib/julia/builder.rb', line 22

def self.columns(*args)
  args.each do |key|
    column(key)
  end
end

.columns_config ⇒ Object 



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# File 'lib/julia/builder.rb', line 28

def self.columns_config
  @columns_config ||= {}
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/julia/builder.rb', line 32

def build
  CSV.generate(**csv_options) do |csv|
    collection.each do |record|
      csv << columns_config.values.map do |action|
        action.get_value(record, self)
      end
    end
  end
end

#default_options ⇒ Object 



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# File 'lib/julia/builder.rb', line 11

def default_options
  {
    headers: columns_config.keys,
    write_headers: true
  }
end