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Editorial Team
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Asked: 2026-06-04T10:20:45+00:00

On a Symfony exploration project, I have a model using doctrine NestedSet behaviour. Since

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On a Symfony exploration project, I have a model using doctrine NestedSet behaviour. Since the data is prepared in a flat file, I wrote a conversion utility to generate corresponding YAML. It turns out that processing NestedSet YML of around 100 records (max_depth=4) consumes over 40MB of PHP memory, which is not available to me.

Is there a work-around to this problem?

I’m thinking of 2 possible solutions.

  1. Write an equivalent PHP script to populate objects & save them
  2. Insert data via SQL statements, the challenge being to compute the left & right nodes

What do Symfonians suggest?

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1 Answer

  1. Editorial Team

    Option 2 was better.

    I wrote a simple macro in Excel to compute the lgt and rgt values required for the pre-order tree. Logic as mentioned here: http://www.sitepoint.com/hierarchical-data-database-2/
    The same Excel utility would convert values to a SQL query that could be dumped via file.

    Going through the fixtures/object route exceeded the allowed memory limit.

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