Class: ROM::SQL::Migration::Writer Private

Inherits:
Object
  • Object
show all
Defined in:
lib/rom/sql/migration/writer.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

API:

  • private

Constant Summary collapse

MIGRATION_BEGIN =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

API:

  • private

"ROM::SQL.migration do\n  change do"
MIGRATION_END =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

API:

  • private

"\n  end\nend\n"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ Writer

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Writer.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 15

def initialize(&block)
  @yield_migration = block
end

Instance Attribute Details

#yield_migration ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 13

def yield_migration
  @yield_migration
end

Instance Method Details

#create_migration(ops) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 25

def create_migration(ops)
  out = MIGRATION_BEGIN.dup
  write(ops, out, "\n    ")
  out << MIGRATION_END

  [migration_name(ops[0]), out]
end

#migration {|recorder| ... } ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Yields:

  • (recorder)

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 19

def migration
  recorder = Recorder.new
  yield(recorder)
  yield_migration.(create_migration(recorder.operations))
end

#migration_name(op) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 60

def migration_name(op)
  create_or_alter, args = op
  table_name = args[0]

  "#{create_or_alter.to_s.sub("_table", "")}_#{table_name}"
end

#write(operations, buffer, indent) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 33

def write(operations, buffer, indent)
  operations.each do |operation|
    op, args, nested = operation
    buffer << indent << op.to_s << ' '
    write_arguments(buffer, args)

    next if nested.empty?

    buffer << ' do'
    write(nested, buffer, "#{indent}  ")
    buffer << indent << 'end'
  end
end

#write_arguments(buffer, args) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



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# File 'lib/rom/sql/migration/writer.rb', line 47

def write_arguments(buffer, args)
  if args.last.is_a?(::Hash)
    args, options = args[0...-1], args.last
  else
    options = EMPTY_HASH
  end

  buffer << args.map(&:inspect).join(', ')
  options.each do |key, value|
    buffer << ', ' << key.to_s << ': ' << value.inspect
  end
end