Commit bc14477b authored by Rene Saarsoo's avatar Rene Saarsoo
Browse files

Add unique constraints.

parent 470dc5c0

comments/schema.sql

+14 −6
Original line number Diff line number Diff line 
CREATE TABLE users (

    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,

    username VARCHAR(255) NOT NULL,

    external_id INT NOT NULL, -- (link to Sencha Forum database)

    username VARCHAR(255) NOT NULL UNIQUE,

    external_id INT NOT NULL UNIQUE, -- (link to Sencha Forum database)

    email VARCHAR(255) NOT NULL, -- (from subscriptions)

    moderator BOOLEAN NOT NULL DEFAULT 0

);
@@ -11,7 +11,9 @@ CREATE TABLE targets ( 
    domain VARCHAR(255) NOT NULL, -- combines sdk & version

    type ENUM('class', 'guide', 'video', 'unknown', 'challenge') NOT NULL DEFAULT 'class',

    cls VARCHAR(255) NOT NULL,    -- "Ext.draw.Sprite"

    member VARCHAR(255) NOT NULL  -- "method-setAttributes"

    member VARCHAR(255) NOT NULL, -- "method-setAttributes"

    -- the whole target must be unique

    UNIQUE KEY (domain, type, cls, member)

);



CREATE TABLE comments (
@@ -33,7 +35,9 @@ CREATE TABLE votes ( 
    value INT NOT NULL, -- +1 or -1

    created_at DATETIME NOT NULL, -- (no data available for now)

    FOREIGN KEY (user_id) REFERENCES users (id),

    FOREIGN KEY (comment_id) REFERENCES comments (id)

    FOREIGN KEY (comment_id) REFERENCES comments (id),

    -- can't vote twice on the same comment

    UNIQUE KEY (user_id, comment_id)

);



CREATE TABLE updates (
@@ -52,7 +56,9 @@ CREATE TABLE subscriptions ( 
    target_id INT NOT NULL,

    created_at DATETIME NOT NULL, -- (no data available for now)

    FOREIGN KEY (user_id) REFERENCES users (id),

    FOREIGN KEY (target_id) REFERENCES targets (id)

    FOREIGN KEY (target_id) REFERENCES targets (id),

    -- can't subscribe twice to the same thread

    UNIQUE KEY (user_id, target_id)

);



CREATE TABLE readings (
@@ -61,7 +67,9 @@ CREATE TABLE readings ( 
    comment_id INT NOT NULL,

    created_at DATETIME NOT NULL, -- (no data available for now)

    FOREIGN KEY (user_id) REFERENCES users (id),

    FOREIGN KEY (comment_id) REFERENCES comments (id)

    FOREIGN KEY (comment_id) REFERENCES comments (id),

    -- can't read the same comment twice

    UNIQUE KEY (user_id, comment_id)

);



CREATE VIEW visible_comments AS SELECT * FROM comments WHERE deleted = 0;