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1
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class AddIssuesNestedSetsColumns < ActiveRecord::Migration
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2
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def self.up
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3
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#add_column :issues, :parent_id, :integer, :default => nil
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add_column :issues, :root_id, :integer, :default => nil
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#add_column :issues, :lft, :integer, :default => nil
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#add_column :issues, :rgt, :integer, :default => nil
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7
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8
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issues=Issue.find(:all)
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9
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args_to_save=Array.new
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10
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say("Issues found: #{issues.size.to_s}")
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12
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issues.each do |issue|
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if issue.parent_id == nil
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15
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args=Hash.new
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args[:parent_id]=0
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args[:id]=issue.id
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args[:root_id]=issue.id
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19
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r=issue.rgt
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20
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l=issue.lft
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if (r-l) > 1
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children=issues.select do |i|
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true if i.id != issue.id && i.lft > l && i.rgt < r
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end
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25
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children.each do |c|
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c_args=Hash.new
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c_args[:id]=c.id
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c_args[:root_id]=issue.id
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c_args[:lft]=c.lft-(l-1)
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c_args[:rgt]=c.rgt-(l-1)
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c_args[:parent_id]=c.parent_id
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32
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args_to_save << c_args
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end
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args[:rgt]=issue.rgt-(l-1)
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35
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args[:lft]=1
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36
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else
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args[:rgt]=2
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38
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args[:lft]=1
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39
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end
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40
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args_to_save << args
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41
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end
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end
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43
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issues.clear()
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45
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say("Total of #{args_to_save.size.to_s} issues will be affected")
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47
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48
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say_with_time "Migrating issues from IssuesGroup plugin" do
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49
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args_to_save.each_with_index do |a,idx|
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say("Issues processed so far: #{idx.to_s}") if (idx > 0 && idx%1000 == 0)
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51
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update_str="parent_id = #{( a[:parent_id] == 0 ? "NULL" : a[:parent_id].to_s)}, root_id = #{a[:root_id].to_s}, lft = #{a[:lft].to_s}, rgt = #{a[:rgt].to_s}"
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52
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Issue.update_all(update_str,"id = #{a[:id].to_s}")
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53
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end
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54
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end
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55
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56
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#Issue.update_all("parent_id = NULL, root_id = id, lft = 1, rgt = 2")
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57
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#Issue.update_all("root_id = id")
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58
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end
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59
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60
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def self.down
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61
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raise ActiveRecord::IrreversibleMigration, "Can't roll back parent information"
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62
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#remove_column :issues, :parent_id
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63
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#remove_column :issues, :root_id
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64
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#remove_column :issues, :lft
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65
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#remove_column :issues, :rgt
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66
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end
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67
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end
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