v5.1.0

• Add validate option to foreign key and check constraints

v5.0.0

• Upgrade development deps
• Add support for ActiveRecord 6
• Add where option to exclusion constraints

v4.0.0

• Add exclusion constraints
• Add check constraints

v3.3.0

• Add unique constraint.

v3.2.0

• Add match constraint.
• Fix the rollback of change view migrations.

v3.1.0

• Add length constraint.

v3.0.0

• Dropped MySQL support.
• Reversible migrations.
• Add index option to add_foreign_key_constraint.

v2.1.0

• Add if option to inclusion constraints.
• Add name option to constraints.
• Add null constraint.
• Ensure presence constraint enforces not null.

v2.0.0

• Add support for enumerated types.
• Add if option to numericality constraints.
• Add if option to presence constraints.
• Fix a bug in presence contraints.

v1.1.0

• Update README.
• Code cleanups.
• Disable monkey patching in rspec.