Class: ETL::Processor::TruncateProcessor
- Defined in:
- lib/etl/processor/truncate_processor.rb
Overview
A processor which will truncate a table. Use as a pre-processor for cleaning out a table prior to loading
Instance Attribute Summary collapse
-
#table ⇒ Object
readonly
Defines the table to truncate.
-
#target ⇒ Object
readonly
Defines the database connection information.
Instance Method Summary collapse
-
#connect ⇒ Object
Connect to the database.
-
#initialize(control, configuration) ⇒ TruncateProcessor
constructor
A new instance of TruncateProcessor.
- #process ⇒ Object
Constructor Details
#initialize(control, configuration) ⇒ TruncateProcessor
Returns a new instance of TruncateProcessor.
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# File 'lib/etl/processor/truncate_processor.rb', line 11 def initialize(control, configuration) super #@file = File.join(File.dirname(control.file), configuration[:file]) @target = configuration[:target] || {} @table = configuration[:table] connect end |
Instance Attribute Details
#table ⇒ Object (readonly)
Defines the table to truncate
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# File 'lib/etl/processor/truncate_processor.rb', line 7 def table @table end |
#target ⇒ Object (readonly)
Defines the database connection information
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# File 'lib/etl/processor/truncate_processor.rb', line 10 def target @target end |
Instance Method Details
#connect ⇒ Object
Connect to the database
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# File 'lib/etl/processor/truncate_processor.rb', line 24 def connect ETL::ActiveRecord::Base.establish_connection( :adapter => (target[:adapter] || :mysql), :username => (target[:username] || 'root'), :host => (target[:host] || 'localhost'), :password => target[:password], :database => target[:database] ) end |
#process ⇒ Object
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# File 'lib/etl/processor/truncate_processor.rb', line 18 def process conn = ETL::ActiveRecord::Base.connection conn.truncate(table) end |