Class: AppConfig::Storage::SQLite

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

Overview

SQLite storage method.

Constant Summary collapse

DEFAULTS = 
{
  database: File.join(Dir.home, '.app_config.sqlite3'),
  table: 'app_config',
}

Instance Method Summary collapse

Methods inherited from Base

#method_missing, #to_hash

Constructor Details

#initialize(options) ⇒ SQLite

Returns a new instance of SQLite.



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# File 'lib/app_config/storage/sqlite.rb', line 14

def initialize(options)
  # Allows passing `true` as an option to just use defaults.
  if options.is_a?(Hash)
    @options = DEFAULTS.merge(options)
  else
    @options = DEFAULTS
  end

  @database = ::SQLite3::Database.new(@options[:database])
  @table = @options[:table]

  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/sqlite.rb', line 28

def reload!
  fetch_data!
end

#save! ⇒ Object 



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# File 'lib/app_config/storage/sqlite.rb', line 32

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

  if @id
    # Update existing row.
    set_attrs = data_hash.map { |k, v| "#{k} = '#{v}'" }.join(', ')
    save_query = "UPDATE #{@table} SET #{set_attrs} WHERE id = #{@id};"
  else
    # Insert a new row.
    if data_hash.empty?
      # Use table defaults.
      save_query = "INSERT INTO #{@table}(id) VALUES(NULL);"
    else
      columns = data_hash.keys.join(', ')
      values = data_hash.map { |_, v| "'#{v}'" }.join(', ')

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

  @database.execute(save_query)
  @database.changes == 1
end