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Are migrations used only when you''re making changes to a database? Does it just allow the developer to avoid using raw SQL when working with databases? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

Hi, I am trying to fit a non-linear model for a parasite dataset. Initially, I tried log-transforming the data and conducting a 2-way ANCOVA, and found that the equal variance of populations and normality assumptions were violated. Gaba et al. (2005) suggests that the Weibull Distribution is best for highly aggregated parasite distributions, and performs better (lower type 1 and 2 error rates) than models using normal (with log-transformed data) and negative binomial error structure. I have looked at the R help site and had no su...

What''s the difference between form_for_tag and form_for? And between form_remote_for and form_remote_tag? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe

Hi, What does the @attr.merge in something like: it "should require a password" do User.new(@attr.merge(:password => "", :password_confirmation => "")). should_not be_valid end do? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.

Hi, What''s the difference between attr_accessor and attr_accessible? Is attr_accessor to create a virtual variable/object and attr_accessible makes it accessible? Do you need attr_accessible if you already have attr_accessor? Thanks! -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: