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PORails - Comments w acts_as_nested_set - When Deleting a Dependent Record is Deleting Destroy Data
 

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    <p>I have the following Models:</p> <pre><code>class Group &lt; ActiveRecord::Base has_many :threads, :dependent =&gt; :destroy class Thread &lt; ActiveRecord::Base has_many :comments, :as =&gt; :commentable, :dependent =&gt; :destroy class Comment &lt; ActiveRecord::Base belongs_to :commentable, :polymorphic =&gt; true acts_as_nested_set </code></pre> <p>The issue I'm having is when a user deletes a group, all kinds of comments are being broken or deleted. I took a look at the logs and this is what's happening:</p> <pre><code>Comment Load (0.8ms) SELECT "comments".* FROM "comments" WHERE ("comments".commentable_id = 101 AND "comments".commentable_type = 'Thread') ORDER BY comments.created_at DESC AREL (0.9ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 649 AND "comments"."rgt" &lt; 650) AREL (0.4ms) UPDATE "comments" SET "lft" = ("lft" - 2) WHERE ("lft" &gt; 650) AREL (0.5ms) UPDATE "comments" SET "rgt" = ("rgt" - 2) WHERE ("rgt" &gt; 650) AREL (0.2ms) DELETE FROM "comments" WHERE ("comments"."id" = 381) AREL (0.4ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 645 AND "comments"."rgt" &lt; 646) AREL (0.4ms) UPDATE "comments" SET "lft" = ("lft" - 2) WHERE ("lft" &gt; 646) AREL (0.4ms) UPDATE "comments" SET "rgt" = ("rgt" - 2) WHERE ("rgt" &gt; 646) AREL (0.2ms) DELETE FROM "comments" WHERE ("comments"."id" = 380) AREL (0.3ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 648 AND "comments"."rgt" &lt; 651) AREL (0.3ms) UPDATE "comments" SET "lft" = ("lft" - 4) WHERE ("lft" &gt; 651) AREL (0.3ms) UPDATE "comments" SET "rgt" = ("rgt" - 4) WHERE ("rgt" &gt; 651) AREL (0.2ms) DELETE FROM "comments" WHERE ("comments"."id" = 379) AREL (0.3ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 644 AND "comments"."rgt" &lt; 647) AREL (0.4ms) UPDATE "comments" SET "lft" = ("lft" - 4) WHERE ("lft" &gt; 647) AREL (0.4ms) UPDATE "comments" SET "rgt" = ("rgt" - 4) WHERE ("rgt" &gt; 647) AREL (0.2ms) DELETE FROM "comments" WHERE ("comments"."id" = 378) AREL (0.4ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 642 AND "comments"."rgt" &lt; 643) AREL (0.8ms) UPDATE "comments" SET "lft" = ("lft" - 2) WHERE ("lft" &gt; 643) AREL (0.4ms) UPDATE "comments" SET "rgt" = ("rgt" - 2) WHERE ("rgt" &gt; 643) AREL (0.2ms) DELETE FROM "comments" WHERE ("comments"."id" = 377) AREL (0.7ms) DELETE FROM "comments" WHERE ("comments"."lft" &gt; 641 AND "comments"."rgt" &lt; 652) AREL (0.9ms) UPDATE "comments" SET "lft" = ("lft" - 12) WHERE ("lft" &gt; 652) AREL (0.9ms) UPDATE "comments" SET "rgt" = ("rgt" - 12) WHERE ("rgt" &gt; 652) AREL (0.3ms) DELETE FROM "comments" WHERE ("comments"."id" = 376) AREL (0.4ms) DELETE FROM "threads" WHERE ("threads"."id" = 101) AREL (0.4ms) DELETE FROM "groups" WHERE ("groups"."id" = 57) </code></pre> <p>Is this normal behavior for acts as nested? I would have expect just the DELETE FROM COMMENTS where Comment.id = XXXX. But instead all this is going on and comment records are breaking.</p> <p>Has anyone seen this before?</p> <p>Thank you</p> <p><strong>UPDATE w What is being used to prevent deep nesting:</strong></p> <pre><code> after_save :ensure_max_nestedset_level def ensure_max_nestedset_level if self.level &gt; 2 self.move_to_child_of(parent.parent) end end </code></pre>
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    1. CODelete problem with awesome_nested_set. May be you can help me http://stackoverflow.com/questions/5976085/deletion-of-a-parent-node-but-not-the-children-with-awesome-nested-set
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