feat: 后端简单接口v0.1(跟前端无关联）

backend-demo/alembic.ini

+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; this defaults
+# to alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat alembic/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = postgresql://postgres:1@localhost:5432/antdemo
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks=black
+# black.type=console_scripts
+# black.entrypoint=black
+# black.options=-l 79
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

backend-demo/alembic/README

+Generic single-database configuration.
\ No newline at end of file

backend-demo/alembic/env.py

+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+import sys                                             
+from os.path import abspath, dirname                   
+sys.path.append(dirname(dirname(abspath(__file__))))  # 将项目路径引入
+
+from api.models import Base
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend-demo/alembic/script.py.mako

+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

backend-demo/alembic/versions/ac95fea8c6b2_message.py

+"""message
+
+Revision ID: ac95fea8c6b2
+Revises: 
+Create Date: 2021-04-08 13:38:44.841600
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'ac95fea8c6b2'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('user',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('email', sa.String(), nullable=True),
+    sa.Column('hashed_password', sa.String(), nullable=True),
+    sa.Column('is_active', sa.Boolean(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_user_email'), 'user', ['email'], unique=True)
+    op.create_index(op.f('ix_user_id'), 'user', ['id'], unique=False)
+    op.create_table('item',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('title', sa.String(), nullable=True),
+    sa.Column('description', sa.String(), nullable=True),
+    sa.Column('owner_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['owner_id'], ['user.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_item_description'), 'item', ['description'], unique=False)
+    op.create_index(op.f('ix_item_id'), 'item', ['id'], unique=False)
+    op.create_index(op.f('ix_item_title'), 'item', ['title'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_item_title'), table_name='item')
+    op.drop_index(op.f('ix_item_id'), table_name='item')
+    op.drop_index(op.f('ix_item_description'), table_name='item')
+    op.drop_table('item')
+    op.drop_index(op.f('ix_user_id'), table_name='user')
+    op.drop_index(op.f('ix_user_email'), table_name='user')
+    op.drop_table('user')
+    # ### end Alembic commands ###

backend-demo/api/crud.py

+from sqlalchemy.orm import Session
+from . import models, schemas
+
+def get_user(db: Session, user_id: int):
+    return db.query(models.User).filter(models.User.id == user_id).first()
+
+def get_user_by_email(db: Session, email: str):
+    return db.query(models.User).filter(models.User.email == email).first()
+
+def get_users(db: Session, skip: int = 0, limit: int = 100):
+    return db.query(models.User).offset(skip).limit(limit).all()
+
+def create_user(db: Session, user: schemas.UserCreate):
+    fake_hashed_password = user.password + "notreallyhashed"
+    db_user = models.User(email=user.email, hashed_password=fake_hashed_password)
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+def get_items(db:Session, skip: int = 0, limit: int = 100):
+    return db.query(models.Item).offset(skip).limit(limit).all()
+
+def create_user_items(db: Session, item: schemas.ItemCreate, user_id: int):
+    db_item = models.Item(**item.dict(), owner_id=user_id)
+    db.add(db_item)
+    db.commit()
+    db.refresh(db_item)
+    return db_item
\ No newline at end of file

backend-demo/api/database.py

+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+SQLALCHEMY_DATABASE_URL = "postgresql://postgres:1@localhost:5432/antdemo"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
\ No newline at end of file

backend-demo/api/main.py

+from typing import List, Optional
+from fastapi import Depends, FastAPI, HTTPException
+from sqlalchemy.orm import Session
+
+from . import crud, models, schemas
+from .database import SessionLocal, engine
+
+models.Base.metadata.create_all(bind=engine)
+
+app = FastAPI()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@app.post("/users", response_model=schemas.User)
+def create_user(user: schemas.UserCreate, db:Session = Depends(get_db)):
+    db_user = crud.get_user_by_email(db, email=user.email)
+    if db_user:
+        raise HTTPException(status_code=400, detail="Email alread register")
+    return crud.create_user(db=db, user=user)
+
+@app.get("/users/", response_model=List[schemas.User])
+def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    users = crud.get_users(db, skip=skip, limit=limit)
+    return users
+
+@app.get("/users/{user_id}", response_model=schemas.User)
+def read_user(user_id: int, db: Session = Depends(get_db)):
+    db_user = crud.get_user(db, user_id=user_id)
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    return db_user
+
+@app.post("/users/{user_id}/items", response_model=schemas.Item)
+def read_items(skip: int = 0, limit: int = 100, db:Session = Depends(get_db)):
+    items = crud.get_items(db, skip=skip, limit=limit)
+    return items

backend-demo/api/models.py

+from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from .database import Base
+
+class User(Base):
+    __tablename__ = "user"
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True)
+    hashed_password = Column(String)
+    is_active = Column(Boolean, default=True)
+    items = relationship("Item", back_populates="owner")
+
+class Item(Base):
+    __tablename__ = "item"
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, index=True)
+    description = Column(String, index=True)
+    owner_id = Column(Integer, ForeignKey("user.id"))
+
+    owner = relationship("User", back_populates="items")
\ No newline at end of file

backend-demo/api/schemas.py

+from typing import List, Optional
+from pydantic import BaseModel
+
+class ItemBase(BaseModel):
+    title: str
+    description: Optional[str] = None
+
+class ItemCreate(ItemBase):
+    pass
+
+class Item(ItemBase):
+    id: int
+    owner_id: int
+    class Config:
+        orm_mode = True
+
+class UserBase(BaseModel):
+    email: str
+
+class UserCreate(UserBase):
+    password: str
+
+class User(UserBase):
+    id: int
+    is_active: bool
+    items: List[Item] = []
+
+    class Config:
+        orm_mode = True
+