Question

我想在django-push-notifications中的PUSH_NOTIFICATIONS_SETTINGS的setting.py中导入应用模型。这是我的代码：

#include "appl.h"
using namespace std;

/*
 Class definition file for Appl
*/
string getFileName(ios_base::open_mode parm);
struct wordBlock {
    string word;
    int count;
};

// Constructor
Appl::Appl()
{
    // id string is required for all CS 162 submissions.  *** DO NOT CHANGE ***
    _cs162_id_ = new string(__FILE__ + string(" compiled ")
                            + __DATE__ + string(" ") + __TIME__
                            + string(" using g++ ") + to_string(__GNUC__)
                            + string(".") + to_string(__GNUC_MINOR__) + string(".")
                            + to_string(__GNUC_PATCHLEVEL__));  
}

// Destructor
Appl::~Appl()
{
    delete _cs162_id_;
}

string inputFileName(ios_base::open_mode parm){
    fstream iFile;
    string inFileName = "";
    int count = 1;

    if(parm == ios::in){
        while(count != 0){
            cout << "Enter an input file name that exists: ";
            getline(cin,inFileName);
            iFile.open(inFileName.c_str() , ios::in);
            if(iFile.good() != true){
                cout << "?Invalid file name : file does not exist" <<                                   
                        count++;
                iFile.clear();
            }else{
                count = 0;
                iFile.close();
                return inFileName;
            }
        }
    }
}

// Main Routine
int Appl::main(int argc, char ** argv)
{
    fstream inFile;
    string inFileNames;

    inFileNames = inputFileName(ios::in);    
    inFile.open(inFileNames.c_str(), ios::in);

    wordBlock inventory[1000];

    if(inFile.is_open()){
        for(auto idx = 0; idx < 1000; idx ++){
            inventory[idx].word = idx;
            inventory[idx].count = 0;
        }

        while(inFile.peek() != EOF) {
            inventory[inFile.get()].count++;
        }
        for(auto idx = 0; idx < 1000; idx++){
            inventory[idx].word = idx;
            inventory[idx].count = 0;
        }

        while(inFile.peek() != EOF) {
            inventory[inFile.get()].count++;
        }
        for(auto idx = 0; idx < 1000; idx++){
            if(inventory[idx].count == 0) continue;
            cout << "Word " << inventory[idx].word << " occurs " << inventory[idx].count << " times" << endl;
        }
        inFile.clear();
        inFile.close();
    }
    return 0;
}

但它在这一行引起了错误：

INSTALLED_APPS = (
    ....
    'my_app',
    'push_notifications'
    ....
)

from my_app.models import User

PUSH_NOTIFICATIONS_SETTINGS = {
    'GCM_API_KEY': 'xxxxx',
    'APNS_CERTIFICATE': 'xxxxx.pem',
    'USER_MODEL': User,  # i want to change the default from auth_user to my_app User
}

错误是：

from my_app.models import User

如何在setting.py中加载my_app模型？

Answer 1

您无法在设置文件中加载模型 - 模型只能在加载所有应用程序后加载（只有在加载设置后才能加载）。

查看django-push-notifications中的代码，您应该能够将模型提供为带有虚线路径的字符串：

'USER_MODEL': 'my_app.User'

Answer 2

您无法在设置中加载用户模型，而是可以更改

PUSH_NOTIFICATIONS_SETTINGS = {
    'GCM_API_KEY': 'xxxxx',
    'APNS_CERTIFICATE': 'xxxxx.pem',
    'USER_MODEL': 'my_app.User',  
}

稍后再使用它：

from django.apps import apps
from django.conf import settings
User = apps.get_model(settings.PUSH_NOTIFICATIONS_SETTINGS['USER_MODEL'])

您可以使用此用户模型做任何您想做的事情

Django设置 - 应用程序还没有加载

2 个答案: