How to migrate correctly with sequel on Access 2007 - ruby

Question

When I migrate my application to Access 2007 with sequel library of Ruby. I get the errors as follows. Does anybody know how to migrate correctly? Thanks.
C:\ContractManagement>rackup
C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/adapters/ado.rb:63:
in `method_missing': WIN32OLERuntimeError: (in OLE method `Execute': ) (Sequel::
DatabaseError)
OLE error code:80040E14 in Microsoft Office Access Database Engine
Syntax error (missing operator) in query expression 'LIMIT 1 1'.
HRESULT error code:0x80020009
Exception occurred.
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/adapte
rs/ado.rb:63:in `block (2 levels) in execute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/databa
se/logging.rb:28:in `log_yield'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/adapte
rs/ado.rb:63:in `block in execute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/connec
tion_pool/threaded.rb:84:in `hold'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/databa
se/connecting.rb:226:in `synchronize'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/adapte
rs/ado.rb:61:in `execute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:541:in `execute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/adapte
rs/ado.rb:97:in `fetch_rows'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:123:in `each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:449:in `single_record'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:457:in `single_value'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:200:in `get'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/datase
t/actions.rb:133:in `empty?'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:499:in `schema_dataset'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:381:in `initialize'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:422:in `initialize'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:332:in `new'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:332:in `run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/sequel-3.23.0/lib/sequel/extens
ions/migration.rb:316:in `apply'
from C:/ContractManagement/config.ru:12:in `block in <main>'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/builder.rb:
51:in `instance_eval'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/builder.rb:
51:in `initialize'
from C:/ContractManagement/config.ru:1:in `new'
from C:/ContractManagement/config.ru:1:in `<main>'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/builder.rb:
40:in `eval'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/builder.rb:
40:in `parse_file'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/server.rb:2
00:in `app'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/server.rb:3
01:in `wrapped_app'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/server.rb:2
52:in `start'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/lib/rack/server.rb:1
37:in `start'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.3.0/bin/rackup:4:in `<to
p (required)>'
from C:/Ruby192/bin/rackup:19:in `load'
from C:/Ruby192/bin/rackup:19:in `<main>'
Here is the connection configuration.
DB = Sequel.ado(:conn_string=>'Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\ContractManagement1.accdb')
And here is the migration steps. All are passed on PostgreSQL 8.4.
Sequel.migration do
up do
create_table :people do
primary_key :id
String :name, :size => 20, :unique => true, :null => false
String :password, :size => 30, :null => false
String :role, :size => 20, :null => false
end
end
down do
drop_table :people
end
end
Sequel.migration do
up do
create_table :currencies do
primary_key :id
String :name, :size => 10, :null => false
end
end
down do
drop_table :currencies
end
end
Sequel.migration do
up do
create_table :statuses do
primary_key :id
String :name, :size => 10, :null => false
end
end
down do
drop_table :statuses
end
end
# encoding: utf-8
Sequel.migration do
up do
create_table :contracts do
primary_key :id
String :contract_id, :size => 36, :unique => true, :null => false
String :content, :size => 150
String :supplier, :size => 30
Date :created_on
Date :expired_on
BigDecimal :amount, :size => [10, 2], :null => false
Fixnum :debt_days
Fixnum :guarantee_period
String :order_id, :size => 50 # 订单号
String :supplier_contract_id, :size => 36
String :operator, :size => 30
foreign_key :currency_id, :currencies, :on_delete => :cascade, :on_update => :cascade, :null => false
foreign_key :status_id, :statuses, :on_delete => :cascade, :on_update => :cascade, :null => false
constraint(:min_amount) { amount >= 0.01 }
end
end
down do
drop_table :contracts
end
end
# encoding: utf-8
Sequel.migration do
up do
self[:currencies].insert(:name => "人民币")
self[:currencies].insert(:name => "欧元")
self[:currencies].insert(:name => "美元")
end
down do
self[:currencies].delete
end
end
# encoding: utf-8
Sequel.migration do
up do
self[:statuses].insert(:name => "执行中")
self[:statuses].insert(:name => "关闭")
self[:statuses].insert(:name => "作废")
end
down do
self[:statuses].delete
end
end
# encoding: utf-8
Sequel.migration do
up do
create_table :payments do
primary_key :id
BigDecimal :prepayment, :size => [10, 2], :default => 0 # 预付金额（元）
BigDecimal :offset_prepayment, :size => [10, 2], :default => 0 # 冲预付
BigDecimal :guarantee_price, :size => [10, 2], :default => 0 # 质保金
BigDecimal :request_amount, :size => [10, 2], :default => 0 # 申请付款额
foreign_key :contract_id, :contracts, :on_delete => :cascade, :on_update => :cascade
foreign_key :person_id, :people, :on_delete => :cascade, :on_update => :cascade
constraint(:offset_prepayment_is_not_greater_than_prepayment) { prepayment >= offset_prepayment } # offset_prepayment不能大于prepayment
end
end
down do
drop_table :payments
end
end
Sequel.migration do
up do
{"admin" => "Admin", "contract" => "ContractOperator", "payment" => "PaymentOperator", "report" => "ReportReviewer"}.each do |n, r|
self[:people].insert(:name => n, :password => n, :role => r)
end
self[:people].insert(:name => "payment1", :password => "payment1", :role => "PaymentOperator")
end
down do
self[:people].delete
end
end

Answer 1

I think you get this error message ...
OLE error code:80040E14 in Microsoft Office Access Database Engine
Syntax error (missing operator) in query expression 'LIMIT 1 1'.
... because Access SQL doesn't support LIMIT. See this reply to a related Stack Overflow question.
See whether you can use Access SQL TOP N as a substitute for LIMIT N.
SELECT TOP 1 m.id, m.paid_in_full, m.date_field
FROM MyTable AS m
ORDER BY m.date_field DESC;

Answer 2

This is fixed in the master branch of Sequel, version 3.24.0 (which will be released next week) will have the bugfix.