DataMapper Google Group

Re: [DataMapper] Decimal datatype

clifford.he...@gmail.com (Clifford Heath) — Fri, 24 May 2013 07:31:37 UT

I see him setting data to 10 - did you miss that? I'm not where I can try
this, but I'd rename data and see if that helps. DM has internal methods,
perhaps you have a a collision?

Re: [DataMapper] Decimal datatype

antilla...@gmail.com (Antonio Antillon) — Thu, 23 May 2013 23:58:55 UT

You are asigning foo to the name field... and nothing to the data field...
in your model, you declared data as a requires field... if you don't assign
anything to it, it's nil... and data must have a value... that's why.
On May 23, 2013 11:18 AM, "Nicholas Wieland" <nicholas.wiel...@gmail.com>
wrote:

Decimal datatype

nicholas.wiel...@gmail.com (Nicholas Wieland) — Thu, 23 May 2013 15:12:00 UT

Hi *, I have a model like this:
class Trait
include DataMapper::Resource
property :id, Serial
property :name, Slug, :required => true
property :data, Decimal, :required => true
has n, :items, :through => :assignments
has n, :assignments
end
and if I do:
irb(main):029:0> t = Trait.new

Re: Mariadb adapter - MySQl

marcin.lewandow...@llp.pl (Marcin Lewandowski) — Tue, 21 May 2013 17:15:39 UT

MariaDB is compatible with MySQL, so it should work with using regular
"mysql" adapter.

W dniu wtorek, 16 kwietnia 2013 02:51:47 UTC+2 użytkownik Sayth Renshaw
napisał:

DataMapper is behaving differently when Rails app is run as console and server

marcin.lewandow...@llp.pl (Marcin Lewandowski) — Tue, 21 May 2013 17:15:01 UT

I have a Rails 3.1 app and I use DataMapper as ORM.
I have following models (stripped):
class Task
include DataMapper::Resource
belongs_to :group
end
class Group
include DataMapper::Resource
belongs_to :project
has n, :tasks
end
class Project
include DataMapper::Resource
has n, :groups

Re: Datamapper autoupgrade for test db

luckysud...@gmail.com (draxxxeus) — Mon, 20 May 2013 05:48:51 UT

RSpec.configure do |config|
config_file = YAML.load_file('settingsyml')[
'test']
DataMapper.setup(:default, config_file['db_url'])
DataMapper.finalize
DataMapper::Model.raise_on_sav e_failure = true

# Flush all tables before each test and enter some default values #

config.before(:each) {

Re: [DataMapper] Digest for datamapper@googlegroups.com - 1 Message in 1 Topic

luckysud...@gmail.com (Sudeep Agarwal) — Mon, 20 May 2013 05:44:27 UT

I have done this in my spec file:

RSpec.configure do |config|
config_file = YAML.load_file('settingsyml')[ 'test']
#DataMapper::Logger.new($stdou t, :debug)
DataMapper.setup(:default, config_file['db_url'])
DataMapper.finalize
DataMapper::Model.raise_on_sav e_failure = true

#----------------------------- ------------------------------ ------------------------------ ---#

Datamapper autoupgrade for test db

aks...@reversehack.in (Akshay Khole) — Sun, 19 May 2013 05:01:41 UT

How can I run an autoupgrade for my test database to contain my schema
before running my specs ?
Currently I do not see a rake task doing that.
Am I missing something?

Error message: SSL SYSCALL error: Connection timed out

n...@vidyasource.com (Neil C) — Mon, 13 May 2013 19:41:16 UT

I have a Rails 3.2 application with DataMapper against Postgres that has
produced this error:
*Error message: SSL SYSCALL error: Connection timed out *
This seems to be a common problem with ActiveRecord and Postgres as
described here: [link]
However, I am curious how the DataMapper community believes this can be

Facing problems with multiple many-to-many relationship, getting '+options[:links]+ should not be empty'

luckysud...@gmail.com (draxxxeus) — Fri, 10 May 2013 07:00:38 UT

I have the structure described here: [link]
Thanks

Facing problem with multiple many-to-many associations

luckysud...@gmail.com (draxxxeus) — Fri, 10 May 2013 06:56:54 UT

Hi,
I want to implement the following scenario:
One user can be owner of multiple groups
One user can be member of multiple groups
One group can have multiple owners
One group can have multiple users
I have two models, User and Group.
In the user model, when I try to do this:
User.get(:id => 1).group_owners

querying 2 tables on a single DM call

i...@tiagomatos.org (Tiago Matos) — Mon, 06 May 2013 22:57:50 UT

Hello,

I have a performance related question.

We have a call which runs multiple times per page load. After reading
[link] we currently have
TranslationTarget.first(:trans lation_key => {:source => source}) but it
first does a query to table TranslationKey then the query

Mariadb adapter - MySQl

flebber.c...@gmail.com (Sayth Renshaw) — Tue, 16 Apr 2013 00:51:47 UT

Simple and short question.
Is it possible to use the MySQL adapter to connect with the MariaDB
database? If Yes How?
Thanks
sayth

Re: [DataMapper] DM 1.2 and various integration issues?

a...@abevoelker.com (Abe Voelker) — Fri, 05 Apr 2013 14:35:05 UT

If it's for a greenfield project with no existing database(s), I'd suggest
using ActiveRecord for the reasons that Chris mentioned. However, I still
think that DataMapper shines when you have an existing (legacy) database
schema that you can't change that you want to write models for.

ActiveRecord assumes that it controls the schema, so it wants to put an

Re: [DataMapper] DM 1.2 and various integration issues?

ch...@w3style.co.uk (Chris Corbyn) — Fri, 05 Apr 2013 13:50:04 UT

You're welcome.

Initially we adopted DM since we needed to fit Rails around our legacy database schema and didn't want to take the hit of having to migrate large parts of our schema (which is accessed by a PHP app and a Rails app, both of which are large). DM helped us greatly in that regard, since it lets you map table names and column names cleanly. We're losing that benefit by leaving DM, but we're just going to get our schema more in line with how AR wants it, over a period of time.

Re: [DataMapper] DM 1.2 and various integration issues?

david_harri...@brown.edu (Harrison, David) — Fri, 05 Apr 2013 13:31:26 UT

Thanks very much for the detailed response. This is very helpful.

Did you consider other Ruby ORMs, like Sequel, rather than ActiveRecord?
[link]
If so, I'd appreciate your thoughts on why you chose to go with
ActiveRecord instead.

Best,
David

--
David Harrison

Re: [DataMapper] DM 1.2 and various integration issues?

ch...@w3style.co.uk (Chris Corbyn) — Fri, 05 Apr 2013 11:27:34 UT

You're nuts, sorry ;) You're moving to a dead project from an actively developed one.

Il giorno 05/apr/2013, alle ore 22:10, kristian <m.krist...@web.de> ha scritto:

Re: [DataMapper] DM 1.2 and various integration issues?

ch...@w3style.co.uk (Chris Corbyn) — Fri, 05 Apr 2013 11:26:31 UT

Here's my $0.02. We're currently in the middle of the huge refactor to remove DM1 from our app and switch over to ActiveRecord. We've been using DM1 for about 18 months at this point.

- DM1 is not being actively developed. Discussion with the core contributors on Twitter came to the conclusion that support for it has ceased and there are no plans to maintain the code any further ([link])

Re: [DataMapper] DM 1.2 and various integration issues?

m.krist...@web.de (kristian) — Fri, 05 Apr 2013 11:10:44 UT

I need to add my two cents. I am currently moving 2-3 three little
application from AR to DM1 using rails and once that is done the next step
is to move from rails to cuba. all problems on the way could be solved so
far.

- christian

Re: [DataMapper] DM 1.2 and various integration issues?

david_harri...@brown.edu (Harrison, David) — Fri, 05 Apr 2013 11:09:30 UT

Thanks very much for the response.

So there are no specific integration issues, but simply much better support
for AR?

Best,
David

--
David Harrison
Lead Developer Analyst
Computing & Information Services
Brown University
401-863-7455

Re: [DataMapper] DM 1.2 and various integration issues?

piotr.soln...@gmail.com (Piotr Solnica) — Fri, 05 Apr 2013 11:07:16 UT

Various gems working with multiple ORMs have better support for AR than DM1. It's just easier to work with AR than DM1 because it has better support in the community. We've shifted focus on DM2 so DM1 is being EOLed.

Cheers

DM 1.2 and Active Scaffold or Formtastic?

david_harri...@brown.edu — Fri, 05 Apr 2013 11:03:15 UT

Just curious, has anyone used Active Scaffold or Formtastic with DM 1.2?
I haven't found references to the two being used together. I hope to try
Active Scaffold with DM 1.2 later today.
Thanks very much.

DM 1.2 and various integration issues?

david_harri...@brown.edu — Fri, 05 Apr 2013 10:58:16 UT

Hello,
I'm considering using datamapper 1.2 on a project.
However, I'm curious what are the "various integration issues" that might
be encountered when using DM 1.2? (See reference below, from December).
Have those issues been resolved?

Re: [DataMapper] Writing DM queries using newer 1.9+ symbol format, how?

gutsho...@gmail.com (gutshorty@gmail.com) — Thu, 04 Apr 2013 01:50:00 UT

So :age.gt doesn't work anymore? Is there a more up-to-date documentation than the DataMapper.org site?

Thanks for the help.

gutsho...@gmail.com

Re: [DataMapper] Writing DM queries using newer 1.9+ symbol format, how?

t...@knowtheory.net (Ted Han) — Thu, 04 Apr 2013 01:45:42 UT

Not quite. Datamapper does two things intelligently. The first is that it
infers what it's supposed to do based on the value of a property.

So when you say `People.all(age: (start..end))` it'll infer that you want
to look for ages within that range.

Additionally DataMapper allows you to use structured keys to indicate other

Re: [DataMapper] Writing DM queries using newer 1.9+ symbol format, how?

gutsho...@gmail.com (gutshorty@gmail.com) — Thu, 04 Apr 2013 01:17:24 UT

Ah, I see.

I did notice that zoo.all(population: (start..end)) is valid. I guess that's what you meant by "mix the two syntaxes."

gutsho...@gmail.com

Re: [DataMapper] Writing DM queries using newer 1.9+ symbol format, how?

ch...@w3style.co.uk (Chris Corbyn) — Thu, 04 Apr 2013 01:08:40 UT

That syntax is not a new Symbol format, it's a new Hash syntax, where the keys are Symbols. You can't use that with DataMapper, since :staff.gt is not a Symbol itself. You can mix the two syntaxes if you want though.

Il giorno 04/apr/2013, alle ore 11:50, Gus Shotz <gutsho...@gmail.com> ha scritto:

Writing DM queries using newer 1.9+ symbol format, how?

gutsho...@gmail.com (Gus Shotz) — Thu, 04 Apr 2013 00:50:30 UT

How would I write zoo.all(:population.gte => 100, :staff.gt => 2) using the
newer symbol: format? I was hoping I could do zoo.all(population: >= 100,
staff: > 2) but it doesn't work.

In memory adapter example for DM2

elva...@gmail.com (Vanja Radovanović) — Sat, 30 Mar 2013 01:30:20 UT

Hi, I've been trying to setup an in memory adapter example for DM2.
Want to use it in a project, so this is kind of an experiment.
Anyway, I'm having trouble inserting records.
Example code can be found here: [link]
The commented out attempt was taken from dm-mapper source, as noted.

How to use Postgres' NOTIFY/LISTEN from DataMapper?

a...@abevoelker.com (Abe Voelker) — Fri, 29 Mar 2013 19:52:06 UT

I'm trying to take advantage of Postgres' awesome NOTIFY<[link]>
/LISTEN <[link]> feature
to avoid polling a table for changes, but am having trouble trying to
figure out how to use them from DataMapper. With the pg driver<[link]>you can call

Re: [DataMapper] Usage of dm-oracle-adapter

david_harri...@brown.edu — Fri, 29 Mar 2013 16:30:58 UT

Thanks Till.
Here is the format of the database.yml file that worked for me. Rather
than using TNS, we used the full host
defaults: &defaults
adapter: oracle
development:
host: some_machine.somewhere.edu:[po rt num]/[SID]
username: MY_SCHEMA
password: NOT_REALLY_MY_PW
<<: *defaults
...

How to Manipulate Join Table Data?

ari.brandeis.k...@gmail.com (Ari King) — Thu, 28 Mar 2013 14:08:58 UT

Hi,
I just recently started using DM and I'm unclear on how one can/should
manipulate data in join tables. Using the photo, tag, tagging example (see
below) -- how can I using DM add, change, or delete data from the "tagging"
table?
class Photo
include DataMapper::Resource
property :id, Serial

Re: MySQL auto_upgrade! failing

sdsurfg...@gmail.com (Dan D) — Wed, 27 Mar 2013 23:49:40 UT

I seem to have fixed it.
I noticed that there was a storage_exists? function in both
dm-do-adapter.rb and dm-mysql-adapter.rb.
Commenting out this block in dm-mysql-adapter.rb solves my issue:
21 def storage_exists?(storage_name)
22 select('SHOW TABLES LIKE ?', storage_name).first == storage_name

Re: [DataMapper] MySQL auto_upgrade! failing

sdsurfg...@gmail.com (Dan D) — Wed, 27 Mar 2013 23:11:12 UT

Same error with different table name.
Output of dm.log:
Wed, 27 Mar 2013 23:02:11 GMT ~ info ~ Logfile created
~ (0.000000) SET sql_auto_is_null = 0
~ (0.000000) SET SESSION sql_mode =
'ANSI,NO_BACKSLASH_ESCAPES,NO_ DIR_IN_CREATE,NO_ENGINE_SUBSTI TUTION,NO_UNSIGNED_SUBTRACTION ,TRADITIONAL'
~ (0.000000) SHOW TABLES LIKE 'Inv1'

Re: [DataMapper] MySQL auto_upgrade! failing

m.krist...@web.de (kristian) — Wed, 27 Mar 2013 03:34:57 UT

frst turn on the logger then you see what SQL is going to DB

DataMapper::Logger.new($stdout , :debug)

does the same error pop up with a different storage name ?

MySQL auto_upgrade! failing

sdsurfg...@gmail.com (Dan D) — Wed, 27 Mar 2013 00:46:58 UT

I'm migrating an app from sqlite to mysql. auto_upgrade! works great with
sqlite, but crashes with mysql saying that the table already exists.
C:/Ruby/lib/ruby/gems/1.8/gems /dm-migrations-1.2.0/lib/dm-mi grations/adapters/dm-do-adapte r.rb:100:in
`execute_non_query': Table 'inv' already exists (DataObjects::SyntaxError)

Re: [Experimental] Repository Pattern on top of Virtus for ActiveRecord, etc

ifre...@gmail.com (Fred Wu) — Tue, 19 Mar 2013 12:50:27 UT

Update: I have just added support for mapping attributes to different ORMs
(ActiveRecord and Sequel for now) for the same entity!

[Experimental] Repository Pattern on top of Virtus for ActiveRecord, etc

ifre...@gmail.com (Fred Wu) — Tue, 19 Mar 2013 04:09:40 UT

Hey guys,
Over the past few days I've started experimenting with the idea of
implementing the repository pattern on top of ActiveRecord (yes, it sounds
scary). The motivation came after we were about to kick start a relatively
large scale system. It would be great to retain the powerfulness of
ActiveRecord as well as making our app easier to maintain and test. It is

Re: [DataMapper] do_oracle adapter and others for 2.0 on windows

luislav...@gmail.com (Luis Lavena) — Thu, 14 Mar 2013 05:41:07 UT

Hello,

The gem authors of do_* adapters rely on rake-compiler and OSX/Linux
setups to be able to produce these binaries.

There are several details for Ruby 2.0.0 and cross-compilation,
specially it is recommended GCC 4.7.2 as compiler since that is the
one used in Windows.

Until today, the recommended compiler for rake-compiler (and ruby

do_oracle adapter and others for 2.0 on windows

dsisn...@gmail.com (Dominic Sisneros) — Wed, 13 Mar 2013 19:23:09 UT

in looking at the code for windows,

rescue LoadError
if RUBY_PLATFORM =~ /mingw|mswin/ then
RUBY_VERSION =~ /(\d+.\d+)/
require "do_oracle/#{$1}/do_oracle"
else

it is requiring the code based on RUBY_VERSION so the gems need to be
updated to require a 2.0 directory for ruby2

Re: [DataMapper] Adding custom methods to a model ?

pabuis...@gmail.com (Pierre-Adrien Buisson) — Mon, 11 Mar 2013 10:20:40 UT

Well, I'm pretty confused... Defining my method as an instance method
didn't seem to work when I tried it. I checked it again this morning and...
boum, it's working. Really doesn't have a clue why it didn't work at first
and works today, I must have missed something last time.

Anyway thanks a lot for your answer, and sorry for this dumb question.

Re: Using postgres's "SIMILAR TO" in a query

johan.f.ljungb...@gmail.com (Johan Ljungberg) — Sun, 10 Mar 2013 07:34:48 UT

While this topic may be very old, i figured i may as well respond to it
just in case someone else happens to look for this.
[link]
Drop that code in your project, and you'll be able to use the symbol
additions like so:
Model.all(:column.similar => '[0-9]')
Model.all(:column.ilike => '%hello%')

Re: [DataMapper] Re: Where is DataMapper 2?

piotr.soln...@gmail.com (Piotr Solnica) — Fri, 08 Mar 2013 19:30:32 UT

Re: [DataMapper] Adding custom methods to a model ?

antilla...@gmail.com (Antonio Antillon) — Thu, 07 Mar 2013 22:05:52 UT

what you're doing there is defining a class method named more_than_fifty?
a method declared like that can be called from the class itself, not an
instance of it.

So, you end up with:
Day.more_than_fifty?

instead of:
day = Day.new
day.more_tan_fifty?

to add instance methods to a class, just declare them like this:

Re: Datamapper and setex from redis

cifani.thi...@gmail.com (Thiago Cifani) — Thu, 07 Mar 2013 20:39:15 UT

Yep, I am using datamapper with redis, so, I would like to set my objects
with this redis function your know. Any way to make this happens?

Adding custom methods to a model ?

pabuis...@gmail.com (Pierre-Adrien Buisson) — Thu, 07 Mar 2013 17:55:32 UT

Hey guys,
I'm beginning with Sinatra and using DataMapper as my ORM tool of choice.
I've been doing great, playing with this today, but I'm now stuck. I'd like
to add a custom method to one of my models, that would check some values of
an instance, make some comparisons and return a boolean.
I tried the following :

Re: [DataMapper] Re: Where is DataMapper 2?

m...@planetmcd.com (Michael McDermott) — Mon, 04 Mar 2013 13:03:22 UT

As a rookie looking to help out if time materializes, where might you
suggest looking?

Re: Where is DataMapper 2?

piotr.soln...@gmail.com (solnic) — Mon, 04 Mar 2013 06:22:36 UT

I should add that dm-mapper is going through another round of refactoring.
We've decided to drop the idea of using "engines" and always rely on
veritas as our RA abstraction (this means that for Arel support we need a
veritas-arel-adapter). It seems like we're finally going into right
direction though so I expect after refactoring is done we'll be able to

Re: Where is DataMapper 2?

gutsho...@gmail.com (Gus Shotz) — Sun, 03 Mar 2013 00:29:48 UT

Here is the official status and roadmap page.<[link]>

Where is DataMapper 2?

i...@groupp5.com (Ivan Pavkovic) — Sat, 02 Mar 2013 23:56:42 UT

I noticed various references to DataMapper 2 on the developer's Github
account, but cannot locate it anywhere.
Has it actually been released yet? Is there a list of changes anywhere?
Thanks