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POActiveRecord::ConnectionNotEstablished error (eager loading?)
 

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    <p>I'm developing on OSX and deploying on Linux. My environments are:</p> <p>Development:</p> <pre><code>OSX Lion Ruby 1.9.2p180 ActiveRecord 3.0.9 PostgreSQL 9.0 </code></pre> <p>Test:</p> <pre><code>Ubuntu Server 11.04 Ruby 1.9.2p290 ActiveRecord 3.1.1 PostgreSQL 9.1 </code></pre> <p>The following pieces of code work on OSX but not on Linux:</p> <pre><code>ei_doc_type = TaxDoc::Model::DocType.find_by_doc_type("EI") doc_version = ei_doc_type.doc_versions.find_by_doc_version(edoc.version) customer.electronic_invoices.create(....) </code></pre> <p>and:</p> <pre><code>ei_doc_type = TaxDoc::Model::DocType.find_by_doc_type("EI") ei_doc_type.doc_versions.each { |doc_version| @mappings[doc_version.doc_version] = Hash.new doc_version.mappings.each { |mapping| @mappings[doc_version.doc_version][mapping.column_name] = mapping.xml_element } } </code></pre> <p>When I try to run any of these pieces of code in Linux I get the following error:</p> <pre><code>.../connection_pool.rb:409: in `retrieve_connection': ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished) </code></pre> <p>I changed the code, and it works on Linux:</p> <pre><code>ei_doc_type = TaxDoc::Model::DocType.find_by_doc_type("EI") doc_versions = TaxDoc::Model::DocVersion.where(:doc_type_id =&gt; ei_doc_type.id, :doc_version =&gt; edoc.version) doc_version = doc_version.first customer.electronic_invoices.create(....) </code></pre> <p>and:</p> <pre><code>ei_doc_type = TaxDoc::Model::DocType.includes(:doc_versions =&gt; :mappings).find_by_doc_type("EI") ei_doc_type.doc_versions.each { |doc_version| @mappings[doc_version.doc_version] = Hash.new doc_version.mappings.each { |mapping| @mappings[doc_version.doc_version][mapping.column_name] = mapping.xml_element } } </code></pre> <p>It seems like eager loading for first order associations is not working on the test environment, and in the first example. Even if I use "includes" it does not work.</p> <p>Is there a difference between versions on ActiveRecord or PostgreSQL that could be causing this?</p> <p>These are my models:</p> <pre><code>class DocType &lt; EDocsDatabase has_many :doc_versions, :dependent =&gt; :destroy has_many :mappings, :through =&gt; :doc_versions has_many :service_types end class DocVersion &lt; EDocsDatabase belongs_to :doc_type has_many :mappings, :dependent =&gt; :destroy end class Mapping &lt; EDocsDatabase belongs_to :doc_version end </code></pre>
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    1. USChris Travers
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    1. COto make sure its not your version, swap your database connection and have your DEV version talk to your TEST database. You need to reconfigure (and make sure ports are open!), but atleast you know if that could cause it. You may also do it vice verse (make your TEST connect to your DEV).
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      1. USRoger
    2. COyou say 'development' and 'test' in your setups, do you really mean dev and production? The two environments you list have different versions of AR. It seems unlikely to me that this is a linux vs OSX issue, and more likely that you are using different versions of ActiveRecord in your two environments, and running into a bug or weird edge case in one of them. The first step is using the same version of ActiveRecord in both (which should not be hard to do, are you not using a Gemfile.lock same between them? You should be). Once you've ensured that, come back again.
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      1. USjrochkind
    3. CO@jrochkind it's really dev and test. but you pointed me to something i haven't noticed: AR, Ruby and PostgreSQL have different versions. i'll check that and try to fix the versions. thanks for pointing me that.
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