maui 开发音乐播放APP 优化用fastapi_amis_admin创建后台及接口（5）

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相关的models

from datetime import datetime
from typing import List, Optional
import sqlmodel
from fastapi_amis_admin.amis.components import ColumnImage, InputImage, InputRichText
from fastapi_amis_admin.models.enums import IntegerChoices
from fastapi_amis_admin.models.fields import Field
from fastapi_user_auth.auth.models import PkMixin, User
from sqlalchemy import Column, String, select
from sqlalchemy.orm import Session
class ArticleStatus(IntegerChoices):unpublished = 0, "未发布"published = 1, "已发布"inspection = 2, "审核中"disabled = 3, "已禁用"
class Category(PkMixin, table=True):__tablename__ = "category"name: str = Field(title="歌曲分类名", sa_column=Column(String(100), unique=True, index=True, nullable=False))description: str = Field(default="", title="描述", amis_form_item="textarea")status: bool = Field(False, title="状态")articles: List["Article"] = sqlmodel.Relationship(back_populates="category")
class ArticleTagLink(sqlmodel.SQLModel, table=True):__tablename__ = "music_tags"tag_id: Optional[int] = Field(default=None, foreign_key="tag.id", primary_key=True)music_id: Optional[int] = Field(default=None, foreign_key="article.id", primary_key=True)
class Tag(PkMixin, table=True):__tablename__ = "tag"name: str = Field(..., title="标签名", sa_column=Column(String(255), unique=True, index=True, nullable=False))articles: List["Article"] = sqlmodel.Relationship(back_populates="tags", link_model=ArticleTagLink)
class Article(PkMixin, table=True):__tablename__ = "article"title: str = Field(title="歌曲名", max_length=200)img: str = Field(None,title="图片",max_length=300,amis_form_item=InputImage(maxLength=1, maxSize=2 * 1024 * 1024, receiver="post:/admin/file/upload"),amis_table_column=ColumnImage(width=100, height=60, enlargeAble=True),)url: str = Field(default="", title="歌曲URL", max_length=200)status: ArticleStatus = Field(ArticleStatus.unpublished, title="status")content: str = Field(..., title="说明", amis_form_item=InputRichText())create_time: Optional[datetime] = Field(default_factory=datetime.utcnow, title="增加时间")source: str = Field(default="", title="来源", max_length=200)category_id: Optional[int] = Field(default=None, foreign_key="category.id", title="分类")category: Optional[Category] = sqlmodel.Relationship(back_populates="articles")tags: List[Tag] = sqlmodel.Relationship(back_populates="articles", link_model=ArticleTagLink)user_id: int = Field(default=None, foreign_key="auth_user.id", title="用户")user: User = sqlmodel.Relationship()@staticmethoddef check_update_permission(session: Session, user: User, item_id: List[str]):# 管理员可以修改全部文章, 并且可以批量修改.if user.has_requires(session, roles=["admin"]):return True# 非管理员,只能修改自己的文章,并且不可批量修改.if len(item_id) > 1:return Falsestmt = select(1).where(Article.id == item_id[0], Article.user_id == user.id)return bool(session.scalar(stmt))

再准备一下菜单页面代码：

from datetime import datetime, timedelta
from typing import Any, Dict, Listfrom apps.music.models import Article, Category, Tag
from core.adminsite import site
from fastapi_amis_admin import admin
from fastapi_amis_admin.admin import AdminApp, PageSchemaAdmin
from fastapi_amis_admin.amis.components import PageSchema, TableColumn
from fastapi_amis_admin.crud.parser import LabelField, PropertyField
from fastapi_amis_admin.crud.schema import Paginator
from fastapi_amis_admin.models import Field
from fastapi_user_auth.auth.models import User
from pydantic import BaseModel
from sqlmodel.sql.expression import Select
from starlette.requests import Request
@site.register_admin
class BlogApp(admin.AdminApp):page_schema = PageSchema(label="音乐管理", icon="fa fa-calculator")router_prefix = "/music"def __init__(self, app: "AdminApp"):super().__init__(app)self.register_admin(ArticleAdmin,CategoryAdmin, TagAdmin)
class CategoryAdmin(admin.ModelAdmin):page_schema = PageSchema(label="音乐分类管理", icon="fa fa-folder")model = Categorysearch_fields = [Category.name]
class TagAdmin(admin.ModelAdmin):page_schema = PageSchema(label="音乐标签管理", icon="fa fa-tags")model = Tagsearch_fields = [Tag.name]link_model_fields = [Tag.articles]
class ArticleAdmin(admin.ModelAdmin):page_schema = PageSchema(label="音乐管理", icon="fa fa-file")model = Article# 配置列表展示字段list_display = [#TableColumn(type="tpl", label="自定义模板列", tpl='<a href="${source}" target="_blank">ID:${id},Title:${title}</a>'),Article.id,Article.title.label("歌名"),Article.img,Category.name,# User.username.label("操作者"),Article.create_time,Article.url,User.nickname.label("昵称"),  # 重命名字段;也可以使用sqlalchemy函数, 例如:#func.count('*').label('music_count'), #注意在`get_select`中修改对应的sql查询语句LabelField(User.nickname.label("nickname2"),Field("默认用户", title="发布者"),  # 通过Field配置Amis表格列信息,Amis表单字段信息.),]# 配置模糊搜索字段search_fields = [Article.title, Category.name, User.username]# 配置关联模型link_model_fields = [Article.tags]# 读取查看表单字段read_fields = [Article,PropertyField(name="category", type_=Category),PropertyField(name="user", type_=User),PropertyField(name="tags", type_=List[Tag]),]# 自定义查询选择器async def get_select(self, request: Request) -> Select:sel = await super().get_select(request)return sel.join(Category, isouter=True).join(User, isouter=True)# 权限验证async def has_page_permission(self, request: Request, obj: PageSchemaAdmin = None, action: str = None) -> bool:return Trueasync def has_list_permission(self, request: Request, paginator: Paginator, filters: BaseModel = None, **kwargs) -> bool:# 用户未登录,不可按标题过滤文章,并且最多每页最多只能查看10条数据.return bool(await self.site.auth.requires(response=False)(request) or (paginator.perPage <= 10 and filters.title == ""))async def has_create_permission(self, request: Request, data: BaseModel, **kwargs) -> bool:# 用户已登录,并且注册时间大于3天,才可以发布文章return bool(await self.site.auth.requires(response=False)(request)and request.user.create_time < datetime.now() - timedelta(days=3)) or await self.site.auth.requires(roles="admin", response=False)(request)async def has_delete_permission(self, request: Request, item_id: List[str], **kwargs) -> bool:# 必须管理员才可以删除文章.return await self.site.auth.requires(roles="admin", response=False)(request)async def has_update_permission(self, request: Request, item_id: List[str], data: BaseModel, **kwargs) -> bool:if not await self.site.auth.requires(response=False)(request):return Falseif item_id is None:return Truereturn await self.site.db.async_run_sync(Article.check_update_permission, request.user, item_id)async def on_create_pre(self, request: Request, obj: BaseModel, **kwargs) -> Dict[str, Any]:data = await super().on_create_pre(request, obj, **kwargs)# 创建新文章时,设置当前用户为发布者data["user_id"] = request.user.idreturn data

接口：

from apps.music.models import Article, ArticleStatus,Category
from core.adminsite import auth, site
from fastapi import APIRouter, Depends
from sqlalchemy import delete, insert, select, update,join,func, not_from sqlmodel.ext.asyncio.session import AsyncSession
from fastapi import Depends, Query
# 通过注册依赖方式验证用户权限,当前路由注册器下全部路由都将进行权限验证.
# router = APIRouter(prefix="/musics", tags=["ArticleAPI"], dependencies=[Depends(auth.requires()())])router = APIRouter(prefix="/api")@router.get("/listmusic", summary="读取歌曲表")
@router.get("/listmusic/{name}", summary="读取歌曲表")
async def list_articles(name: str = '',page: int = Query(1, ge=1, description="页码"),page_size: int = Query(10, le=100, description="每页数量"),db: AsyncSession = Depends(site.db.session_generator)
):# 构建基本查询query = select([Article.id,Article.title,Article.img,Article.url,Article.content,Article.source,Category.name.label("category_name")]).select_from(join(Article,Category, Category.id == Article.category_id))# 添加模糊查询条件if name:query = query.where(func.lower(Article.title).like(func.lower(f"%{name}%")))# 计算偏移量offset = (page - 1) * page_size# 添加分页条件query = query.offset(offset).limit(page_size)# 执行查询result = await db.execute(query)# 获取查询结果articles = result.fetchall()return articles
@router.get("/{id}", response_model=Article, summary="读取歌曲详情")
async def read_article(id: int, session: AsyncSession = Depends(site.db.session_generator)):return await session.get(Article, id)