Class: Garden::Mediators::Table

Inherits:
Object
  • Object
show all
Defined in:
lib/garden/mediators.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(namish) ⇒ Table

Returns a new instance of Table.



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# File 'lib/garden/mediators.rb', line 26

def initialize namish
  
  @name = Table.parse_table_name namish
  
  # Get the ActiveRecord model from the tablename.
  begin
    @clazz = @name.classify.constantize
    raise "Class #{@clazz.to_s} is not an ActiveRecord subclass." unless @clazz.new.is_a?(ActiveRecord::Base)
  rescue Exception => e
    puts " ** Could not derive ActiveRecord model from the provided name: #{namish}. Exception: #{e.message}"
  end
  
  @instance = @clazz.new
  
end

Class Method Details

.get_instance(table_name, id) ⇒ Object 



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# File 'lib/garden/mediators.rb', line 8

def self.get_instance table_name, id

  # puts "Find #{id} from #{table_name}"
  # puts id.class.to_s

  begin
    clazz = table_name.to_s.classify.constantize
    raise "Class #{clazz.to_s} is not an ActiveRecord subclass." unless clazz.new.is_a?(ActiveRecord::Base)
    instance = clazz.find id.to_s
    return instance
  rescue Exception => e
    puts "Could not find #{id} from table #{table_name}: #{e.message}"
    return nil
  end
end

.parse_table_name(namish) ⇒ Object 



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# File 'lib/garden/mediators.rb', line 5

def self.parse_table_name namish
  namish.parameterize.underscore
end

Instance Method Details

#create_instance(attributes) ⇒ Object 



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# File 'lib/garden/mediators.rb', line 60

def create_instance attributes
  relationships = @relationships
  

  attributes = parse_row_relationships attributes, relationships

  instance = @clazz.new

  rejected = {}
  attributes.each_key do |key|
    rejected[key] = attributes.delete(key) if !instance.attributes.include?(key.to_s) && !relationships.include?(key.to_s)
  end

  instance.attributes = attributes

  # instance.id = rejected[:id] if rejected.key?(:id)

  # puts "Valid? #{instance.valid?}"
  # puts instance.errors.to_s

  valid = instance.valid?

  if instance.valid?
    instance.save!
    puts ".Saved instance: #{@clazz} #{instance.to_param}"
  else
    puts "Invalid instance."
    puts "#{@name}:"
    puts " - Valid attributes: #{attributes.keys}"
    puts " - Invalid attributes: #{rejected.keys}"
    puts " - Association attributes: #{relationships}"
    puts " - #{instance.errors}"
  end
end

#parse_headers(array) ⇒ Object 



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# File 'lib/garden/mediators.rb', line 46

def parse_headers array
  @headers = array.map { |header| header.to_s.parameterize.underscore }
  @relationships = []
  
  @headers.each do |header|
    @relationships.push header if @clazz.reflections.keys.include?(header.to_sym)
  end
end

#parse_row_relationships(hash, relationships) ⇒ Object 



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# File 'lib/garden/mediators.rb', line 95

def parse_row_relationships hash, relationships
  relationships.each do |r|
    # puts "Parsing row relationship: #{hash[r.to_sym]}"
    instance = get_instance r, hash[r.to_sym]
    hash[r.to_sym] = instance
  end
  hash
end

#relationships ⇒ Object 



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# File 'lib/garden/mediators.rb', line 56

def relationships
  @relationships
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/garden/mediators.rb', line 42

def valid?
  @clazz != nil
end