The situation:
merb 1.0.12 updated to merb 1.1 so as to be able to use the bundler
and current rubygems
merb 1.1 needs dm 0.10.1
models no longer function with dm 0.10.1.
== code start ==
class I90Ctlfil
include DataMapper::Resource
property :id , Serial
property :ctlidz, Discriminator, :index => true
property :ctlcdz, String , :index => true, :length => 20
property :ctlsdz, Date , :index => true
property :ctledz, Date
property :ctldsz, String , :length => 30
property :ctlxxz, String , :length => 256
end
class Kyrmanuf < I90Ctlfil
def self.get_points(underwriter, risk, year)
year = year.to_i
rows = self.all(:fields => [:ctlcdz, :ctlxxz, :ctlsdz], :order =>
[:ctlcdz.asc], :ctlcdz.like => "#{underwriter}#{risk}%")
return nil if rows.nil?
rows.each_with_index do |row, i|
if i <= rows.size-2
return row.ctlxxz[0,2].to_i - row.ctlxxz[2,2].to_i if year >=
row.ctlcdz[5,4].to_i and year < rows[i+1].ctlcdz[5,4].to_i
else
return row.ctlxxz[0,2].to_i - row.ctlxxz[2,2].to_i
end
end
end
end
== code end ==
Kyrmanuf.get_points(underwriter, risk, year)
fails with "can't modify frozen object - (TypeError)"
on
return nil if rows.nil?
This is not complicated code, I just want to know if I got any results...
ok so I replaced
return nil if rows.empty?
with
p rows
and the error in full is
merb : worker (port 4000) ~ can't modify frozen object - (TypeError)
project/gems/gems/dm-core-0.10.1/lib/dm-core/resource.rb:491:in
`original_attributes'
project/gems/gems/dm-core-0.10.1/lib/dm-core/resource.rb:90:in `key'
project/gems/gems/dm-core-0.10.1/lib/dm-core/resource.rb:89:in `map'
project/gems/gems/dm-core-0.10.1/lib/dm-core/resource.rb:89:in `key'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1208:in
`resource_added'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1228:in
`resources_added'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1228:in `each'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1228:in
`resources_added'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:480:in `concat'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1008:in `lazy_load'
project/gems/gems/extlib-0.9.13/lib/extlib/lazy_array.rb:451:in `map'
project/gems/gems/dm-core-0.10.1/lib/dm-core/collection.rb:902:in `inspect'
project/app/models/i90_ctlfils/kyrmanuf.rb:18:in `p'
project/app/models/i90_ctlfils/kyrmanuf.rb:18:in `get_points'
For now I'm just going to ditch dm and go couchdb/couchrest so i can
get on with this project (all the data I'm interacting with in
dm/mysql is read-only, write/read is in couchdb/couchrest)
Maybe someone will offer a simple solution and I can go back to the
dm/couch branch of my project.
Git branching ftw :)
Nick
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