Class: AppConfig::Storage::MySQL

Inherits:
Base
  • Object
show all
Defined in:
lib/app_config/storage/mysql.rb

Constant Summary collapse

DEFAULTS = 
{
  host: 'localhost',
  port: 3306,
  database: 'app_config',
  table: 'app_config',
  username: nil,
  password: nil,
}

Instance Method Summary collapse

Methods inherited from Base

#method_missing, #to_hash

Constructor Details

#initialize(options) ⇒ MySQL

Returns a new instance of MySQL.



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# File 'lib/app_config/storage/mysql.rb', line 17

def initialize(options)
  # Allows passing `true` as an option, which uses the defaults.
  if options.is_a?(Hash)
    @options = DEFAULTS.merge(options)
  else
    @options = DEFAULTS
  end

  @table = @options.delete(:table)

  setup_client!
  fetch_data!
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class AppConfig::Storage::Base

Instance Method Details

#reload! ⇒ Object 



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# File 'lib/app_config/storage/mysql.rb', line 31

def reload!
  fetch_data!
end

#save! ⇒ Object 



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# File 'lib/app_config/storage/mysql.rb', line 35

def save!
  data_hash = @data.to_h
  data_hash.delete(:id)

  if @id
    # Update existing row.
    set_attrs = data_hash.map do |k, v|
      if v.is_a?(TrueClass) || v.is_a?(FalseClass)
        "#{k} = #{v}"  # Don't quote booleans.
      else
        "#{k} = '#{v}'"
      end
    end.join(', ')
    save_query = "UPDATE #{@table} SET #{set_attrs} WHERE id = #{@id};"
  else
    # Create a new row.
    if data_hash.empty?
      # Use defaults.
      save_query = "INSERT INTO #{@table}(id) VALUES(NULL);"
    else
      columns = data_hash.keys.join(', ')
      values = data_hash.map do |_, v|
        if v.is_a?(TrueClass) || v.is_a?(FalseClass)
          "#{v}"  # Don't quote booleans.
        else
          "'#{v}'"
        end
      end.join(', ')

      save_query = "INSERT INTO #{@table} (#{columns}) VALUES (#{values});"
    end
  end

  @client.query(save_query)
  @client.affected_rows == 1
end