https://blog.csdn.net/liuweiyuxiang/article/details/71104613

def search(request):

    searchtype = request.POST.get("searchtype")

    keyword = request.POST.get("keyword")

    if searchtype == "all":

        #多個欄位模糊查詢， 括號中的下劃線是雙下劃線，雙下劃線前是欄位名，雙下劃線後可以是icontains或contains,區別是是否大小寫敏感，豎線是或的意思

        sciencenews = models.Sciencenews.objects.filter(Q(title__icontains=keyword)\

|Q(content__icontains=keyword)|Q(author__icontains=keyword))

    elif searchtype == "author":

        #單個欄位模糊查詢

        sciencenews = models.Sciencenews.objects.filter(author__icontains=keyword)

    elif searchtype == "title":

        sciencenews = models.Sciencenews.objects.filter(title__icontains=keyword)

    elif searchtype == "content":

        sciencenews = models.Sciencenews.objects.filter(content__icontains=keyword)

else:

#使用點連線的filter連結串列示and

sciencenews = models.Sciencenews.objects.filter(author__icontains=keyword).\

filter(title__icontains=keyword).filter(content__icontains=keyword)

    return render(request,"show/index.html",{"param":sciencenews,"searchtype":searchtype,"keyword":keyword})

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