2022-11-19 05:47:09 +00:00
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---
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title: "Database Schema"
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description: "Authelia Development Database Schema Guidelines"
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lead: "This section covers the database schema guidelines we use for development."
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2022-11-25 12:44:55 +00:00
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date: 2022-11-19T16:47:09+11:00
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2022-11-19 05:47:09 +00:00
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draft: false
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images: []
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menu:
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contributing:
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parent: "guidelines"
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weight: 320
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toc: true
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aliases: []
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---
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## Table Names
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1. Should match in every database implementation.
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2. Should be all lower case.
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3. Should use singular form (i.e. not plural).
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4. Should use the underscore character (`_`) between words.
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5. Should only contain alphanumeric characters and the underscore character (`_`).
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1. The underscore character (`_`):
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1. Should always be used between words.
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2. Should only be used:
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1. Between words.
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2. As a prefix for temporary tables.
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2. Should start and end with only an alphabetic character, excluding specific exceptions mentioned elsewhere with
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prefix and suffix terminology.
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## Column Names
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1. Should match in every database implementation.
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2. Should be all lower case.
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3. Should only contain alphanumeric characters and the underscore character (`_`).
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1. The underscore character (`_`):
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1. Should always be used between words.
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2. Should only be used between words.
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2. Should only start and end with an alphabetic character.
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## Key Names
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### Foreign Keys
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Format: `<table_name>_<column_name>_fkey`
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Where:
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- The table name is the name of the table the foreign key exists on.
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- The column name is the name of the column the foreign key is for.
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### Unique Keys
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Format: `<table_name>_<key_name>_key`
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Where:
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- The table name is the name of the table the unique key is on.
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- The key name is the name to describe this key. This can also be the column name it exists on.
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### Primary Keys
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Most database engines don't allow customizing the primary key names. As such the primary key should not be explicitly
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set except to change it back to the default format.
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