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August 29, 2015 14:05
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Concern for adding ability to serialize a model's table to create a seed_fu insert script
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| module SeedFuSerializeable | |
| extend ActiveSupport::Concern | |
| included do | |
| define_method(:to_h) do | |
| h = attributes.keys.select{|k| k != "created_at" && k != "updated_at" }.map{|k| "#{k}: #{k}"}.join(', ') | |
| eval("{#{h}}") | |
| end | |
| end | |
| # I got the to_seed_fu from http://stackoverflow.com/questions/7951746/seed-fu-from-existing-database | |
| # I just wrapped it in a concern and tacked on a define to_h | |
| module ClassMethods | |
| def to_seed_fu(outfile=$stdout) | |
| SeedFu::Writer.write(outfile, { class_name: self.to_s, constraints: [:id]}) do |writer| | |
| all.order(:id).each do |obj| | |
| writer.add(obj.to_h) | |
| end | |
| end | |
| end | |
| end | |
| end |
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I found myself needing to update Sqlite3 and MySql databases from a PostgreSQL db. About 2 mins into writing a script to make my sql dump generic I thought what I really need is a generic data inserter like seed_fu. This lead to some Googling and to me writing the above concern. I've made a few project specific modifications since then but this is the original.