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schema.sql
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schema.sql
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-- Create the ENUM type for difficulty_level
CREATE TYPE difficulty_level AS ENUM ('easy', 'medium', 'hard');
CREATE TABLE IF NOT EXISTS "User" (
user_id SERIAL PRIMARY KEY,
username VARCHAR(255),
email VARCHAR(255) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL,
want_to_change_password BOOLEAN NOT NULL DEFAULT FALSE,
registration_day TIMESTAMP NOT NULL DEFAULT NOW(),
last_login_day TIMESTAMP NOT NULL DEFAULT NOW()
);
CREATE TABLE IF NOT EXISTS Post (
post_id SERIAL PRIMARY KEY,
user_id INTEGER,
title VARCHAR(255),
content VARCHAR(255),
post_data TIMESTAMP,
last_modified_data TIMESTAMP NOT NULL DEFAULT NOW(),
image_id INTEGER,
difficulty_level difficulty_level NOT NULL
);
CREATE TABLE IF NOT EXISTS Comment (
comment_id SERIAL PRIMARY KEY,
post_id INTEGER,
user_id INTEGER,
content VARCHAR(255),
comment_data TIMESTAMP NOT NULL DEFAULT NOW()
);
CREATE TABLE IF NOT EXISTS Image (
image_id SERIAL PRIMARY KEY,
timestamp TIMESTAMP NOT NULL DEFAULT NOW(),
caption VARCHAR(255),
user_id INTEGER,
image_link VARCHAR(255),
pinned BOOLEAN
);
CREATE TABLE IF NOT EXISTS Reaction (
reaction_id INTEGER PRIMARY KEY,
user_id INTEGER,
image_id INTEGER,
like_type BOOLEAN
);
CREATE TABLE IF NOT EXISTS Friendship (
user_id_one INTEGER NOT NULL,
user_id_two INTEGER NOT NULL,
CONSTRAINT pk_friendship PRIMARY KEY (user_id_one, user_id_two),
CONSTRAINT fk_user_one
FOREIGN KEY (user_id_one)
REFERENCES "User" (user_id)
ON DELETE CASCADE,
CONSTRAINT fk_user_two
FOREIGN KEY (user_id_two)
REFERENCES "User" (user_id)
ON DELETE CASCADE,
CONSTRAINT check_user_id_order CHECK (user_id_one < user_id_two)
);
-- Add foreign key constraints to Post table
ALTER TABLE Post ADD CONSTRAINT FK_Post_User FOREIGN KEY (user_id) REFERENCES "User"(user_id);
ALTER TABLE Post ADD CONSTRAINT FK_Post_Image FOREIGN KEY (image_id) REFERENCES Image(image_id);
-- Add foreign key constraints to Comment table
ALTER TABLE Comment ADD CONSTRAINT FK_Comment_Post FOREIGN KEY (post_id) REFERENCES Post(post_id);
ALTER TABLE Comment ADD CONSTRAINT FK_Comment_User FOREIGN KEY (user_id) REFERENCES "User"(user_id);
-- Add foreign key constraints to Image table
ALTER TABLE Image ADD CONSTRAINT FK_Image_User FOREIGN KEY (user_id) REFERENCES "User"(user_id);
-- Add foreign key constraints to Reaction table
ALTER TABLE Reaction ADD CONSTRAINT FK_Reaction_User FOREIGN KEY (user_id) REFERENCES "User"(user_id);
ALTER TABLE Reaction ADD CONSTRAINT FK_Reaction_Image FOREIGN KEY (image_id) REFERENCES Image(image_id);
-- Add foreign key constraints to Friendship table
ALTER TABLE Friendship ADD CONSTRAINT FK_Friendship_User_One FOREIGN KEY (user_id_one) REFERENCES "User"(user_id);
ALTER TABLE Friendship ADD CONSTRAINT FK_Friendship_User_Two FOREIGN KEY (user_id_two) REFERENCES "User"(user_id);
-- Add a column to the User table for password reset
--ALTER TABLE "User" ADD COLUMN want_to_change_password BOOLEAN NOT NULL DEFAULT FALSE;