如何使用django可视化d3js中的mysql数据？

Question

我在MySQL数据库中有我的数据,我需要将d3.js中的数据可视化为气泡图.我有可能在Django框架中这样做,如果是这样的话怎么样？

Answer 1

是的,你可以使用Django来做到这一点.您需要做的就是创建一个Django PyDev(python)应用程序.在settings.py文件中,将数据库作为,

    DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql', 
        'NAME': 'myDB',  # your mysql database name    
        'USER': '123', # your mysql user for the database
        'PASSWORD': '123', # password for user
        'HOST': '127.0.0.1', 
        'PORT': '3306', 
        } 

在views.py中的函数定义中给出mysql连接,

    conn = MySQLdb.connect (host = "127.0.0.1",
                        user = "root", # mysql root
                        passwd = "root", # mysql root password
                        db = "myDB")

使用游标从表中检索数据然后转换为json,

cursor.execute ("select <column> from <table>")

rows=dictfetchall(cursor)


object_list = []
for row in rows:
    d = collections.defaultdict()
    d['name'] = row['name']       
    object_list.append(d)

j = json.dumps(object_list)
objects_file = 'path of json file to be created'
m = open(objects_file,'w')
print >> m,j    #to write to file
conn.close() 

def dictfetchall(cursor):
    "Returns all rows from a cursor as a dictionary"
    desc = cursor.description
    return [
        dict(zip([col[0] for col in desc], row))
        for row in cursor.fetchall()
    ]

现在您可以使用此json文件来创建任何类型的d3js.