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Wednesday November 04 2026
- Add a column or an index (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that adds a column with a default and an index to an existing table on every SQL engine, through the engine's own schema handler, checks the catalog first so it completes a half-applied change, and drops… - Add a database table (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that creates a table of the site's own on every engine from a share/db_schema.dba definition, writes a first row, and drops it again in down() - with the dry run, the run, the checks and the rollback. - Add roles and policies (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that creates the role News editor with its policies, limits two of them to the class news_article, assigns it to the user group Editors found by remote id, and removes role, policies and assignment in down(). - Captions and rollback in practice (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Walk through the ways back after a migration run - the automatic restore after a failure, rolling back a whole run, one migration with its down(), an earlier caption for experts - with the commands, their output and… - Change content in bulk (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that walks every object of a class in batches, publishes a new version of each one that needs the change, commits per object, logs its progress and is safe to run again - the pattern for any change to many… - Coming from Doctrine Migrations (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
For developers who know Doctrine Migrations from Symfony projects - every Doctrine command and class mapped to its Exponential 6 counterpart, what Exponential adds (captions, commit, tag and push, environments… - Coming from the Kaliop migration bundle (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
For developers who used the Kaliop eZ Migration Bundle (ezmigrationbundle) on eZ Platform and Ibexa projects - its commands, files and table mapped to Exponential 6, and a YAML content, class and role step rewritten by… - Coming from SQL update files (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
For teams that ship database changes as hand-written SQL files and update scripts - how one change becomes one PHP migration that knows every engine, is recorded, captioned and committed, with a worked example of an… - Create or change a content class (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that creates the content class news_article with its attributes and class group, the same way on development, staging and production, and the pattern for changing a class (its name, its name pattern) in a… - Deploying with migrations: CI/CD and GitHub Actions (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Run migrations as part of every deploy - the order of the steps, a complete GitHub Actions workflow that checks pull requests and deploys over SSH, the exit codes a pipeline acts on, the installation lock, and runs… - Migrations on MySQL, PostgreSQL, SQLite, Oracle and MongoDB (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
What each database engine means for a migration - transactions, the simulation, captions and the restore, schema changes that commit at once - and how to write one migration that works on MySQL/MariaDB, PostgreSQL… - Fix data (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that corrects wrong rows - names with stray spaces, addresses over http - with a pure function that the plan, the run and a test share, escaped SQL through the run's connection, and the old values in the run… - Large data migrations: batches, time limits and resume (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Change thousands of objects or rows in one migration without running out of memory or locking the site - batches, transactional() returning false, an idempotent up(), pauses, maintenance mode, and resuming a run that… - Migrations in an extension or package (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Ship migrations inside an extension (extension/<name>/migrations/) or an installed package, generate them with --source=extension:<name>, and make a site's migrations wait for them with requires. - Move or rename INI settings (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A PHP migration that moves settings of an installation's override from site.ini to a file of their own and renames one on the way, keeps the value of each installation, writes the new file before it removes the old… - Per-environment migrations: development, staging and production (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Limit a migration to some environments with the header line environments, set the environment of each installation, and follow one change from development through staging to production. - Commit, tag and push the record of a run (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
Set up the migrations repository so every run's status file and log are committed, tagged migrations/<environment>/<run-id> and pushed; choose between the site's own repository and a separate one, push what failed… - Reviewing a migration in code review (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A checklist for reviewing a migration in a pull request - the file and header, the order, plan(), up() and down(), engines and transactions, ids that differ between installations, personal data, and what the reviewer… - Seed content for a new site (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
A migration that publishes the starting content of a site - a folder and its first articles - by remote id, only what is missing, in the language of the content root, so every new installation and every developer's copy… - Team workflow with git: branches, conflicts and order (Updated, Markdown page)
Markdown documentation (help center) · Migrations · Changed 01:08 pm
How several developers write migrations on branches without stepping on each other - timestamps and order, requires for real dependencies, two migrations with the same timestamp, rebasing, renaming only before a merge…
