244 lines
9.8 KiB
Python
244 lines
9.8 KiB
Python
import json
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import os
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import urllib.parse
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import openpyxl
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from django.apps import apps
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from django.core.exceptions import ValidationError
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from django.shortcuts import render
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from openpyxl import load_workbook
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from django.conf import settings
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from django.contrib.auth.decorators import login_required
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from django.contrib.staticfiles import finders
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from django.core.files.storage import default_storage
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from django.http import FileResponse, HttpResponseNotFound, JsonResponse
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from django.views.decorators.csrf import csrf_protect
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from rest_framework.serializers import ModelSerializer
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def error_page(request):
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return render(request, 'error_page.html')
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@login_required
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def download_template(request, template_name):
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"""
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该视图提供下载指定的Excel模板文件。
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参数:
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request: HttpRequest对象。
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template_name: 请求下载的Excel模板文件的名称，期望是一个字符串。
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fields: 包含字段信息的字典，用于生成Excel文件的表头和格式。
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返回:
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FileResponse对象，允许用户下载生成的Excel文件。
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如果文件未找到，则返回一个HttpResponseNotFound响应。
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"""
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# 使用finders.find()根据文件名在Django的静态文件目录中查找文件的绝对路径
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file_path = finders.find(f'excels/{template_name}')
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# 如果文件路径不存在，返回404响应
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if not file_path:
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return HttpResponseNotFound('<h1>文件未找到</h1>')
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# 创建FileResponse对象，设置为以附件形式下载，设置MIME类型为Excel文件
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response = FileResponse(open(file_path, 'rb'),
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content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
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# 设置Content-Disposition头，告诉浏览器这是一个需要下载的文件
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# 使用urllib.parse.quote对文件名进行URL编码，以确保文件名中包含的特殊字符不会引起问题
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response['Content-Disposition'] = f'attachment; filename="{urllib.parse.quote(template_name)}"'
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return response
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@login_required
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def download_excel_template(request, template_name, fields):
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"""
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该视图提供下载指定的Excel模板文件。
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参数:
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request: HttpRequest对象。
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template_name: 请求下载的Excel模板文件的名称，期望是一个字符串。
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fields: 包含字段信息的字典，用于生成Excel文件的表头和格式。
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返回:
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FileResponse对象，允许用户下载生成的Excel文件。
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如果文件未找到，则返回一个HttpResponseNotFound响应。
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"""
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fields = json.loads(urllib.parse.unquote(fields).replace("'", '"'))
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# 创建一个新的工作簿
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wb = openpyxl.Workbook()
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ws = wb.active
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# 设置表头行
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headers = [field['label'] for field in fields if field['is_add']]
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ws.append(headers)
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# 保存生成的Excel文件到指定路径
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static_dir = os.path.join(settings.BASE_DIR, 'static', 'excels')
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if not os.path.exists(static_dir):
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os.makedirs(static_dir)
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temp_file_path = os.path.join(static_dir, template_name)
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wb.save(temp_file_path)
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# 创建FileResponse对象，设置为以附件形式下载，设置MIME类型为Excel文件
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response = FileResponse(open(temp_file_path, 'rb'),
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content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
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response['Content-Disposition'] = f'attachment; filename="{urllib.parse.quote(template_name)}"'
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return response
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@csrf_protect
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@login_required
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def common_excel_parse(request):
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"""
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该函数用于解析上传的Excel文件并返回数据。
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Args:
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request: HTTP请求对象，包含上传的Excel文件。
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Returns:
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JsonResponse: 包含解析后的Excel数据的JSON响应，或包含错误消息的JSON响应。
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Raises:
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N/A
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"""
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# 如果是POST请求并且有上传的文件
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if request.method == 'POST' and request.FILES:
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# 获取上传的Excel文件
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excel_file = request.FILES.get('excel_file')
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# 如果没有提供文件，返回错误响应
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if not excel_file:
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return JsonResponse({'error': '请先选择文件。'}, status=400)
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# 获取模型名称
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model_config = request.POST.get('model_config', '')
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# 动态获取模型
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try:
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app_label, model_name = model_config.split('.')
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model = apps.get_model(app_label, model_name)
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except (LookupError, KeyError, ValueError):
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return JsonResponse({'error': '模型配置错误。'}, status=400)
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# 获取模型中配置的不需要的字段
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exclude_fields = getattr(model, 'excluded_fields', [])
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# 保存文件到服务器
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file_name = default_storage.save(excel_file.name, excel_file)
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file_path = os.path.join(settings.MEDIA_ROOT, file_name)
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def create_dynamic_serializer(mod, include):
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class DynamicSerializer(ModelSerializer):
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class Meta:
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model = mod
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fields = include
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return DynamicSerializer
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try:
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# 打开并解析Excel文件
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workbook = load_workbook(file_path, data_only=True)
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sheet = workbook.active
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data = []
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# 读取第一行作为表头
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header_row = [cell.value for cell in sheet[1]]
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# 获取字段名和 verbose_name，排除索引字段
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model_fields = [field.name for field in model._meta.fields if
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not field.primary_key and field.name not in exclude_fields]
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model_verbose_name = [field.verbose_name for field in model._meta.fields if
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not field.primary_key and field.name not in exclude_fields]
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if not all(item in model_verbose_name for item in header_row):
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return JsonResponse({'error': '表头不匹配，请使用正确的Excel上传模板。'}, status=400)
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# 组成 fields_map
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fields_map = dict(zip(model_fields, header_row))
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fields_map_nf = dict(zip(header_row, model_fields))
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# 检查表头是否与模型字段名对应
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# if not set(header_row).issubset(model_verbose_name):
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# return JsonResponse({'error': '表头不匹配，请使用正确的Excel上传模板。'}, status=400)
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# 创建一个映射，将Excel表头映射到模型字段名
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header_to_field_map = {header: fields_map_nf[header] for header in header_row}
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header_fields = [header_to_field_map[header] for header in header_row]
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for row in sheet.iter_rows(min_row=2, values_only=True):
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if not all(value is None for value in row):
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# 使用映射来确保每个Excel单元格的数据对应到正确的模型字段
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instance_data = {header_to_field_map[header]: value for header, value in zip(header_row, row)}
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instance = model(**instance_data)
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try:
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instance.full_clean()
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data.append(instance)
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except ValidationError as e:
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return JsonResponse({'error': f'数据校验错误: {e.message_dict}'}, status=400)
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# 动态获取序列化器
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serializer_class = create_dynamic_serializer(model, include=header_fields)
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serializer = serializer_class(data, many=True)
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# 清理，删除上传的文件
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os.remove(file_path)
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return JsonResponse({"table_data": serializer.data, "fields_map": fields_map}, safe=False)
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except Exception as e:
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# 清理，删除上传的文件
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os.remove(file_path)
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return JsonResponse({'error': f'解析文件时出错: {str(e)}'}, status=500)
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return JsonResponse({'error': '请求错误'}, status=400)
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@csrf_protect
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@login_required
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def save_excel_table_data(request):
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if request.method == 'POST':
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try:
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data = json.loads(request.body)
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model_config = data.get('model_config')
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table_data = data.get('table_data')
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if not model_config or not table_data:
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return JsonResponse({'error': '缺少必要的参数'}, status=400)
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# 分割 model_config 以获取 app_label 和 model_name
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try:
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app_label, model_name = model_config.split('.')
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Model = apps.get_model(app_label, model_name)
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except (ValueError, LookupError):
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return JsonResponse({'error': '无效的 model_config'}, status=400)
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# 创建模型实例列表
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instances = []
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for row_data in table_data:
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try:
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instance = Model(**row_data)
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instance.full_clean() # 验证数据
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instances.append(instance)
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except ValidationError as e:
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return JsonResponse({'error': f'数据校验错误: {e.message_dict}'}, status=400)
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except Exception as e:
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return JsonResponse({'error': f'创建实例时出错: {str(e)}'}, status=500)
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# 批量创建模型实例
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try:
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Model.objects.bulk_create(instances)
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except Exception as e:
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return JsonResponse({'error': f'批量保存数据时出错: {str(e)}'}, status=500)
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return JsonResponse({'message': '表格数据保存成功'}, status=200)
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except json.JSONDecodeError:
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return JsonResponse({'error': '无效的JSON格式'}, status=400)
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except Exception as e:
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return JsonResponse({'error': f'服务器内部错误: {str(e)}'}, status=500)
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return JsonResponse({'error': '无效的请求方法'}, status=400)
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