的Django 1.7，模板不是從views.py

Question

蟒蛇3.4.2 的Django 1.7.1 的Postgres 9.4

顯示數據我試圖從Postgres的查詢數據並將其發送到模板進行渲染。

我已經包括了模型，視圖，urls.py，和媒體頁面

我認爲這個問題是在views.py，和contextDict VAR我發送到模板。

1. 什麼應該發生：
   1. 用戶點擊index.html，然後點擊一個鏈接，查看有關
   2. 的index.html加載views.py「媒體」功能的媒體資產的詳細信息
   3. 媒體函數捕獲slugify URL並使用它來查詢DB
   4. views.py中的'media'函數將數據加載到變量中
   5. 'media'函數傳遞請求，模板url和變量t Ø模板
   6. 模板處理變量並將該頁面發送到用戶的客戶端
2. 發生了什麼
   1. 用戶點擊index.html，然後點擊鏈接查看有關媒體資產的詳細資訊
   2. 的index.html加載views.py MDIA功能
   3. 用戶將看到一個渲染頁面的文本「指定的項目{{projectSlugTitle}}不存在」

什麼，我認爲這個問題是 步驟3-6爲f ****了，我覺得問題在於無論是在我的查詢到數據庫，或者我如何傳遞數據給模板

模型：

from django.db import models 
from django.utils import timezone 
from django.template.defaultfilters import slugify 

#table for media files: audio, video, design 
class Media(models.Model): 
    #choicesConstants 
    #type 
    MEDIATYPE_FILM = 'MEDIATYPE_FILM' 
    MEDIATYPE_AUDIO = 'MEDIATYPE_AUDIO' 
    MEDIATYPE_DESIGN = 'MEDIATYPE_DESIGN' 

    #category 
    MEDIACATEGORY_MAJOR = 'MEDIACATEGORY_MAJOR' 
    MEDIACATEGORY_INDIE = 'MEDIACATEGORY_INDIE' 

    #genre 
    MEDIAGENRE_RAP = 'MEDIAGENRE_RAP' 
    MEDIAGENRE_ROCK = 'MEDIAGENRE_ROCK' 
    MEDIAGENRE_TECHNO = 'MEDIAGENRE_TECHNO' 

    #choicesList 
    choicesType = (
     (MEDIATYPE_FILM,'Video'), 
     (MEDIATYPE_AUDIO,'Audio'), 
     (MEDIATYPE_DESIGN,'Design'), 
    ) 

    choicesCategory = (
     (MEDIACATEGORY_INDIE,'Indie'), 
     (MEDIACATEGORY_MAJOR,'Major'), 
    ) 

    choicesGenre = (
     (MEDIAGENRE_RAP,'Rap'), 
     (MEDIAGENRE_ROCK,'Rock'), 
     (MEDIAGENRE_TECHNO,'Techno') 
    ) 

    #boolean 
    mediaPublished = models.BooleanField(default=True) 

    #char fields 
    title = models.CharField(max_length=256,blank=True) 
    type = models.CharField(max_length=256,choices=choicesType, default=MEDIATYPE_FILM) 
    category = models.CharField(max_length=256,choices=choicesCategory,default=MEDIACATEGORY_MAJOR) 
    genre = models.CharField(max_length=256,choices=choicesGenre,default=MEDIAGENRE_TECHNO) 

    #integer fields 
    views = models.IntegerField(default=0) 
    upVotes = models.IntegerField(default=0) 
    downVotes = models.IntegerField(default=0) 

    #date fields 
    dateAdded = models.DateTimeField(default=timezone.now) 
    datePublished = models.DateTimeField(blank=True,null=True) 
    dateDePublished = models.DateTimeField(blank=True,null=True) 

    #urlfields 
    intUrl = models.URLField(blank=True) 
    extUrl = models.URLField(blank=True) 

    #email fields 
    mediaEmail = models.EmailField(max_length=254,blank=True) 

    #decimalFields 
    mediaB2bPrice = models.DecimalField(max_digits=20,decimal_places=2,default=0) 
    mediaB2cPrice = models.DecimalField(max_digits=20,decimal_places=2,default=0) 

    #slugFields 
    slug1 = models.SlugField() 

    #functionUtility 
    def __str__(self): 
     return self.title 

    #functionMath 
    def totalVotes(self): 
     return int(self.upVotes)+int(self.downVotes) 

    def percentUpVotes(self): 
     return int(self.upVotes)/int(self.totalVotes) 

    def percentDownVotes(self): 
     return int(self.downVotes)/int(self.totalVotes) 

    def save(self, *args,**kwargs): 
     self.slug1 = slugify(self.title) 
     super(Media, self).save(*args, **kwargs) 

    #metaData 
    class Meta: 
     ordering = ['dateAdded','title'] 
     get_latest_by = 'dateAdded' 
     verbose_name = 'Media' 
     verbose_name_plural = 'Media' 

#tablef for projects, contain multiple media files 
class Project(models.Model): 
    #manyToMany relationships 
    media = models.ManyToManyField(Media,null=True,blank=True) 

    #boolean 
    projectPublished = models.BooleanField(default=True) 

    #charFields 
    title = models.CharField(blank=True,max_length=256) 

    #textFields 
    projectDescription = models.TextField(blank=True) 

    #email fields 
    projectEmail = models.EmailField(max_length=254,blank=True) 

    #dateFields 
    dateCreated = models.DateTimeField(default=timezone.now) 
    datePublished = models.DateTimeField(blank=True,null=True) 

    #decimalFields 
    projectB2bPrice = models.DecimalField(max_digits=20,decimal_places=2,default=0) 
    projectB2cPrice = models.DecimalField(max_digits=20,decimal_places=2,default=0) 

    #slugFields 
    slug1 = models.SlugField() 

    #functionsUtility 
    def __str__(self): 
     return self.title 

    def save(self, *args, **kwargs): 
     self.slug1 = slugify(self.title) 
     super(Project, self).save(*args, **kwargs) 

    #metaData 
    class Meta: 
     ordering = ['dateCreated','title'] 
     get_latest_by = 'dateAdded' 
     verbose_name = 'Project' 
     verbose_name_plural = 'Projects' 

視圖：

def project(request,theProjectSlug): 
    contextDict = {} 
    try: 
     #retrieve the project with the matching slug name 
     project = Project.objects.get(slug1=theProjectSlug) 
     contextDict['projectName'] = project.title 

     #retrieve all of the associated media files of the project above 
     mediaFiles = Media.objects.all().filter(project=project) 

     #add mediaFiles to contextDict,add the project to the contextDict 
     contextDict['mediaFilesOfProject'] = mediaFiles 
     contextDict['project'] = project 

    except Project.DoesNotExist: 
     pass 

    return render(request, 'famecity/media.html', contextDict) 

urls.py：

urlpatterns = patterns('', 
         url(r'^$',views.index,name='index'), 
         url(r'^about/',views.about,name='about'), 
         url(r'^media/(?P<theProjectSlug>[\w\-]+)/$',views.project,name='project') 

      ) 

所呈現的頁面：

<!DOCTYPE html> 
<html> 
<head> 
    <title>Fame.city Projects 
    </title> 
</head> 

<body> 
    <h1> 
     projectName: {{ projectName }}<br/> 
     mediaFilesOfProject: {{mediaFilesOfProject}}<br/> 
     project: {{project}}<br/> 
    </h1> 
    {% if project %} 
     {% if media %} 
      <ul> 
       {% for mFile in media %} 
        <li> 
         <a href="{{mFile.url}}">{{mFile.title}}</a> 
        </li> 
       {% endfor %} 
      </ul> 
     {% else %} 
      <strong>No media files exist</strong> 
     {% endif %} 
    {% else %} 
     The specified project {{projectSlugTitle}} does not exist 
    {% endif %} 
</body> 
</html> 

Answer 1

發現問題

我查詢項目表，而不是媒體表

當用戶點擊index.html，然後單擊媒體鏈接，我上面的代碼發送給Project表創建一個SQL，並且由於後面的行基於第一個變量的初始值，從那裏級聯錯誤。