Postgres array support for activerecord

Add basic support for postgres arrays to activerecord, with special attention to getting rails migrations / schema dumps working nicely.

Installation

gem install activerecord-postgres-array

or if you use bundler

gem 'activerecord-postgres-array'

Usage

• In your migrations you can define postgres array fields such as:
  

  create_table :people do |t|
    ...
    t.string_array :real_energy
    t.decimal_array :real_energy, :precision => 18, :scale => 6
    ...
  end
  

• When queried, the postgres arrays will be returned as ruby arrays, and vice versa.

Current limitations

• Validation of serialised postgres array strings is currently not implemented.
• Parsing of multi-dimensional postgres array strings is currently not implemented.
• String and Decimal arrays have been tested, but other array types have not been. Type casting will need to be implemented for booleans, dates, etc

Future enhancements

• Arel like querying of values within arrays
• Arel like aggregate functions