discourse/db/migrate/20170328163918_break_up_themes_table.rb
Sam a3e8c3cd7b FEATURE: Native theme support
This feature introduces the concept of themes. Themes are an evolution
of site customizations.

Themes introduce two very big conceptual changes:

- A theme may include other "child themes", children can include grand
children and so on.

- A theme may specify a color scheme

The change does away with the idea of "enabled" color schemes.

It also adds a bunch of big niceties like

- You can source a theme from a git repo

- History for themes is much improved

- You can only have a single enabled theme. Themes can be selected by
    users, if you opt for it.

On a technical level this change comes with a whole bunch of goodies

- All CSS is now compiled using a custom pipeline that uses libsass
    see /lib/stylesheet

- There is a single pipeline for css compilation (in the past we used
    one for customizations and another one for the rest of the app

- The stylesheet pipeline is now divorced of sprockets, there is no
   reliance on sprockets for CSS bundling

- CSS is generated with source maps everywhere (including themes) this
    makes debugging much easier

- Our "live reloader" is smarter and avoid a flash of unstyled content
   we run a file watcher in "puma" in dev so you no longer need to run
   rake autospec to watch for CSS changes
2017-04-12 10:53:49 -04:00

55 lines
1.4 KiB
Ruby

class BreakUpThemesTable < ActiveRecord::Migration
def change
create_table :theme_fields do |t|
t.integer :theme_id, null: false
t.integer :target, null: false
t.string :name, null: false
t.text :value, null: false
t.text :value_baked
t.timestamps
end
add_index :theme_fields, [:theme_id, :target, :name], unique: true
[
[0, "embedded_scss", "embedded_scss"],
[0, "common_scss", "scss"],
[1, "desktop_scss", "scss"],
[2, "mobile_scss", "scss"],
[0, "head_tag", "head_tag"],
[0, "body_tag", "body_tag"],
[1, "header", "header"],
[2, "mobile_header", "header"],
[1, "top", "after_header"],
[2, "mobile_top", "after_header"],
[1, "footer", "footer"],
[2, "mobile_footer", "footer"],
].each do |target, value, name|
execute <<SQL
INSERT INTO theme_fields (
theme_id,
target,
name,
value,
created_at,
updated_at
)
SELECT id, #{target}, '#{name}', #{value}, created_at, updated_at
FROM themes WHERE #{value} IS NOT NULL AND LENGTH(BTRIM(#{value})) > 0
SQL
remove_column :themes, value
end
%w{ head_tag_baked
body_tag_baked
header_baked
footer_baked
mobile_footer_baked
mobile_header_baked
}.each do |col|
remove_column :themes, col
end
end
end