auto_upgrade! NameError: no member 'limit' in struct

[tommarshall]

Calling Model.auto_upgrade! for a second (or any subsequent time) raises a NameError after the initial run.

irb(main):001:0> Location.auto_upgrade!
NameError: no member 'limit' in struct
	from (irb):1

Model:

class Location < ApplicationRecord
  col :name,        as: :string, null: false
  col :description, as: :text
  timestamps

  validates :name, presence: true

  has_many :spaces
end

Full stack:

NameError: no member 'limit' in struct
Did you mean?  limit=
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:253:in `[]'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:253:in `block in field_attr_changes'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:252:in `each'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:252:in `field_attr_changes'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:393:in `block in auto_upgrade!'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:391:in `each'
/usr/local/bundle/bundler/gems/mini_record-cc3edb544089/lib/mini_record/auto_schema.rb:391:in `auto_upgrade!'
/app/lib/tasks/mini_record.rake:10:in `block (3 levels) in <top (required)>'
/app/lib/tasks/mini_record.rake:4:in `each'
/app/lib/tasks/mini_record.rake:4:in `block (2 levels) in <top (required)>'
/usr/local/bundle/gems/rake-12.1.0/exe/rake:27:in `<top (required)>'

Versions:

rails: 5.1.4
mini_record: 0.5.0

[tommarshall]

cc: @dan-watson

[tommarshall]

Downgrading to 5.0.6 resolves the issue.

irb(main):001:0> Location.auto_upgrade!
=> {true=>{}, false=>{}}