feat: ERD, SQL for init database and docker-dev env for the database (#5)

Author: DuGuYifei

ERD.png

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+FROM pgvector/pgvector:0.8.0-pg16
+
+ENV POSTGRES_USER=postgres \
+    POSTGRES_PASSWORD=postgres \
+    POSTGRES_DB=devdb
+
+COPY ./init.sql /docker-entrypoint-initdb.d/
+
+EXPOSE 5432

postgresql/Dockerfile-dev

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+version: "3.8"
+
+services:
+  pgvector:
+    build:
+      context: .
+      dockerfile: Dockerfile-dev
+    container_name: pgvector-dev
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: hrapp
+    volumes:
+      - pgdata_dev:/var/lib/postgresql/data
+    restart: unless-stopped
+
+volumes:
+  pgdata_dev:

postgresql/docker-compose-dev.yml

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+CREATE EXTENSION IF NOT EXISTS vector;
+
+CREATE TYPE UserRole AS ENUM ('CANDIDATE', 'HR');
+
+CREATE TABLE Users (
+    userID UUID PRIMARY KEY,
+    fullName VARCHAR(255),
+    email VARCHAR(255) UNIQUE NOT NULL,
+    passwordHash TEXT NOT NULL,
+    role UserRole NOT NULL,
+    creationTimestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TYPE JobStatus AS ENUM ('OPEN', 'CLOSED', 'DRAFT');
+CREATE TYPE RequirementType AS ENUM ('SKILL', 'EXPERIENCE', 'EDUCATION', 'OTHER');
+
+CREATE TABLE JobPostings (
+    jobID UUID PRIMARY KEY,
+    title VARCHAR(255),
+    description TEXT,
+    status JobStatus,
+    creationTimestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    closingDate DATE,
+    lastModifiedTimestamp TIMESTAMP,
+    hrCreatorID UUID REFERENCES Users(userID),
+    lastModifiedByUserID UUID REFERENCES Users(userID)
+);
+
+CREATE TABLE JobRequirements (
+    requirementID UUID PRIMARY KEY,
+    jobID UUID REFERENCES JobPostings(jobID) ON DELETE CASCADE,
+    description TEXT,
+    type RequirementType,
+    isMandatory BOOLEAN
+);
+
+CREATE TYPE ApplicationStatus AS ENUM ('SUBMITTED', 'IN_REVIEW', 'SHORTLISTED', 'REJECTED', 'INTERVIEWING', 'OFFERED', 'HIRED');
+
+CREATE TABLE Applications (
+    applicationID UUID PRIMARY KEY,
+    submissionTimestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    status ApplicationStatus,
+    resumeContent TEXT,
+    originalResumeFilename VARCHAR(255),
+    originalResumeFileReference VARCHAR(255),
+    lastModifiedTimestamp TIMESTAMP,
+    candidateID UUID REFERENCES Users(userID),
+    jobID UUID REFERENCES JobPostings(jobID),
+    lastModifiedByUserID UUID REFERENCES Users(userID)
+);
+
+CREATE TYPE FilterStatus AS ENUM ('PASSED_FILTER', 'FAILED_FILTER', 'NOT_EVALUATED');
+
+CREATE TABLE Assessments (
+    assessmentID UUID PRIMARY KEY,
+    assessmentTimestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    overallScore FLOAT,
+    summary TEXT,
+    resumeAnalysisDetails JSON,
+    filterStatus FilterStatus,
+    lastModifiedTimestamp TIMESTAMP,
+    applicationID UUID REFERENCES Applications(applicationID),
+    lastModifiedByUserID UUID REFERENCES Users(userID)
+);
+
+CREATE TABLE ChatSessions (
+    sessionID UUID PRIMARY KEY,
+    startTime TIMESTAMP,
+    endTime TIMESTAMP,
+    assessmentID UUID REFERENCES Assessments(assessmentID)
+);
+
+CREATE TYPE MessageSender AS ENUM ('AI', 'CANDIDATE');
+
+CREATE TABLE ChatMessages (
+    messageID UUID PRIMARY KEY,
+    sender MessageSender,
+    timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    content TEXT,
+    messageOrder INTEGER,
+    sessionID UUID REFERENCES ChatSessions(sessionID)
+);
+
+-- Store embeddings linked to documents or concepts used in GenAI
+CREATE TABLE Embeddings (
+    embeddingID UUID PRIMARY KEY,
+    documentReference TEXT, -- where the embedding comes from (the link to the document)
+    content TEXT,
+    embedding VECTOR(1536), -- adjust dimension as per model used (this one is text-embedding-ada-002	OpenAI	1536)
+    createdAt TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);

postgresql/init.sql

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+#!/bin/bash
+
+# 构建镜像并启动服务
+docker-compose -f docker-compose-dev.yml up --build -d
+
+# 可选：打印数据库连接信息
+echo "PostgreSQL is running at: localhost:5432"
+echo "Database: hrapp | User: postgres | Password: postgres"