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[Dotenv] Added a note about the order of env vars #12052

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Jul 31, 2019
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[Dotenv] Added a note about the order of env vars #12052

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8 changes: 8 additions & 0 deletions components/dotenv.rst
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Expand Up @@ -97,6 +97,14 @@ Use environment variables in values by prefixing variables with ``$``:
DB_USER=root
DB_PASS=${DB_USER}pass # Include the user as a password prefix

.. note::

The order is important when some env var depends on the value of other env
vars. In the above example, ``DB_PASS`` must be defined after ``DB_USER``.
Moreover, if you define multiple ``.env`` files and put ``DB_PASS`` first,
its value will depend on the ``DB_USER`` value defined in other files
instead of the value defined in this file.

Embed commands via ``$()`` (not supported on Windows):

.. code-block:: terminal
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