Commit 2d7d80f4 authored by Rene Saarsoo's avatar Rene Saarsoo
Browse files

Add ON DELETE CASCADE to all foreign keys.

parent 1c4b38c2

comments/schema.sql

+10 −10
Original line number Diff line number Diff line
@@ -24,8 +24,8 @@ CREATE TABLE comments ( 
    content_html TEXT NOT NULL,

    created_at DATETIME NOT NULL,

    deleted BOOLEAN NOT NULL DEFAULT 0,

    FOREIGN KEY (user_id) REFERENCES users (id),

    FOREIGN KEY (target_id) REFERENCES targets (id)

    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE,

    FOREIGN KEY (target_id) REFERENCES targets (id) ON DELETE CASCADE

) ENGINE = InnoDB, CHARACTER SET = utf8;



CREATE TABLE votes (
@@ -34,8 +34,8 @@ CREATE TABLE votes ( 
    comment_id INT NOT NULL,

    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 (user_id) REFERENCES users (id) ON DELETE CASCADE,

    FOREIGN KEY (comment_id) REFERENCES comments (id) ON DELETE CASCADE,

    -- can't vote twice on the same comment

    CONSTRAINT unique_votes UNIQUE KEY (user_id, comment_id)

) ENGINE = InnoDB, CHARACTER SET = utf8;
@@ -46,8 +46,8 @@ CREATE TABLE updates ( 
    comment_id INT NOT NULL,

    action ENUM('update', 'delete') DEFAULT 'update',

    created_at DATETIME NOT NULL,

    FOREIGN KEY (user_id) REFERENCES users (id),

    FOREIGN KEY (comment_id) REFERENCES comments (id)

    FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE,

    FOREIGN KEY (comment_id) REFERENCES comments (id) ON DELETE CASCADE

) ENGINE = InnoDB, CHARACTER SET = utf8;



CREATE TABLE subscriptions (
@@ -55,8 +55,8 @@ CREATE TABLE subscriptions ( 
    user_id INT NOT NULL,

    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 (user_id) REFERENCES users (id) ON DELETE CASCADE,

    FOREIGN KEY (target_id) REFERENCES targets (id) ON DELETE CASCADE,

    -- can't subscribe twice to the same thread

    CONSTRAINT unique_subscriptions UNIQUE KEY (user_id, target_id)

) ENGINE = InnoDB, CHARACTER SET = utf8;
@@ -66,8 +66,8 @@ CREATE TABLE readings ( 
    user_id INT NOT NULL,

    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 (user_id) REFERENCES users (id) ON DELETE CASCADE,

    FOREIGN KEY (comment_id) REFERENCES comments (id) ON DELETE CASCADE,

    -- can't read the same comment twice

    CONSTRAINT unique_readings UNIQUE KEY (user_id, comment_id)

) ENGINE = InnoDB, CHARACTER SET = utf8;