TypeError：字符串索引必须是django中的整数

Question

我正在尝试将json存储到bigchainDB中。 但是问题是，当我在对json对象进行硬编码并在其他节点之间进行广播时，它会获得成功。 但是当我从邮递员发送相同的json对象时，我得到一个错误string indices must be integers

这是我的功能

 def index(request):
    root = settings.BIGCHAINDB
    bdb = BigchainDB(root)
    alice, bob = generate_keypair(), generate_keypair()
    insertDB =  json.dumps(request.body.decode("utf-8"))
    jsonDict =  json.loads(insertDB)
    prepared_token_tx = bdb.transactions.prepare(
        operation='CREATE',
        signers=alice.public_key,
        recipients=[([bob.public_key], 10)],
        asset=jsonDict)
    fulfilled_token_tx = bdb.transactions.fulfill(
        prepared_token_tx,
        private_keys=alice.private_key)
    bdb.transactions.send_commit(fulfilled_token_tx)
    txid = fulfilled_token_tx['id']
    return HttpResponse(txid)

JSON对象：

{“ data”：{“ cphNumber”：“ 321”，“ farmName”：“ 313”，“ addressLine1”：“ 13”，“ addressLine2”：“ 13”，“ region”：“ 13”，“ postalCode”： “ 13”，“ corrName”：“ 13”，“ corrAddressLine1”：“ 131”，“ corrAddressLine2”：“ 31”，“ corrRegion”：“ 31”，“ corrCountry”：“ 321”，“ corrPostal”：“ 31 “，” corrMobile“：” 321“，” corrEmail“：” 31“，” agentName“：” 31“，” agentAddressLine1“：” 313“，” agentAddressLine2“：” 132“，” agentRegion“：” 13“， “ agentCountry”：“ 132”，“ agentPostal”：“ 132”，“ brn”：“ 13”，“ animalSpecies”：“ 132”}}

 Django Version: 2.1.7 Python Version: 3.7.1 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'api'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Traceback: File "/home/user/miniconda3/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner 34. response = get_response(request) File "/home/user/miniconda3/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response 126. response = self.process_exception_by_middleware(e, request) File "/home/user/miniconda3/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response 124. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/user/miniconda3/lib/python3.7/site-packages/django/views/decorators/csrf.py" in wrapped_view 54. return view_func(*args, **kwargs) File "/home/user/Desktop/blockchain/api/views.py" in index 48. asset=jsonDict) File "/home/user/miniconda3/lib/python3.7/site-packages/bigchaindb_driver/driver.py" in prepare 254. inputs=inputs, File "/home/user/miniconda3/lib/python3.7/site-packages/bigchaindb_driver/offchain.py" in prepare_transaction 132. inputs=inputs, File "/home/user/miniconda3/lib/python3.7/functools.py" in wrapper 824. return dispatch(args[0].__class__)(*args, **kw) File "/home/user/miniconda3/lib/python3.7/site-packages/bigchaindb_driver/offchain.py" in _prepare_create_transaction_dispatcher 45. return prepare_create_transaction(**kwargs) File "/home/user/miniconda3/lib/python3.7/site-packages/bigchaindb_driver/offchain.py" in prepare_create_transaction 196. asset=asset['data'] if asset else None, Exception Type: TypeError at /api/ Exception Value: string indices must be integers 

任何建议都是最欢迎的。 提前致谢。

Answer 1

这里的问题是您在request.body上使用了json.dumps() ，它已经是一个字符串。 因此，当对此使用json.loads()时，您的数据不会被解析为dict 。

 def index(request):
    root = settings.BIGCHAINDB
    bdb = BigchainDB(root)
    alice, bob = generate_keypair(), generate_keypair()
    insertDB =  request.body.decode("utf-8")  # Don't use json.dumps() here
    jsonDict =  json.loads(insertDB)
    prepared_token_tx = bdb.transactions.prepare(
        operation='CREATE',
        signers=alice.public_key,
        recipients=[([bob.public_key], 10)],
        asset=jsonDict)
    fulfilled_token_tx = bdb.transactions.fulfill(
        prepared_token_tx,
        private_keys=alice.private_key)
    bdb.transactions.send_commit(fulfilled_token_tx)
    txid = fulfilled_token_tx['id']
    return HttpResponse(txid)

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