Using Flask with SQLAlchemy and Dash
1
I am trying to build a web app to display some data. So far I have set up a Flask framework using an SQL database. I am now trying to set up a Dash dashboard. I create the 2 apps and database as follows:
server = Flask(__name__)
app = Dash(__name__, server=server, url_base_pathname='/dashboard/')
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
db = SQLAlchemy(app) # create database
However this throws up the error:
Traceback (most recent call last):
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/run.py", line 1, in <module>
from LightDogs import app
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/LightDogs/__init__.py", line 12, in <module>
db = SQLAlchemy(app) # create database
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 683, in __init__
self.init_app(app)
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 799, in init_app
app.extensions['sqlalchemy'] = _SQLAlchemyState(self)
AttributeError: 'Dash' object has no attribute 'extensions'
Does anyone know how to move past this and successfully create the SQLAlchemy database from the Dash app?
Thanks!
python flask flask-sqlalchemy dashboard dash
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
add a comment |
1
I am trying to build a web app to display some data. So far I have set up a Flask framework using an SQL database. I am now trying to set up a Dash dashboard. I create the 2 apps and database as follows:
server = Flask(__name__)
app = Dash(__name__, server=server, url_base_pathname='/dashboard/')
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
db = SQLAlchemy(app) # create database
However this throws up the error:
Traceback (most recent call last):
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/run.py", line 1, in <module>
from LightDogs import app
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/LightDogs/__init__.py", line 12, in <module>
db = SQLAlchemy(app) # create database
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 683, in __init__
self.init_app(app)
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 799, in init_app
app.extensions['sqlalchemy'] = _SQLAlchemyState(self)
AttributeError: 'Dash' object has no attribute 'extensions'
Does anyone know how to move past this and successfully create the SQLAlchemy database from the Dash app?
Thanks!
python flask flask-sqlalchemy dashboard dash
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Why don't you initializeSQLAlchemyusing flask app, that is,server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?
– Mikhail Berlinkov
Jan 2 at 21:01
add a comment |
1
1
1
I am trying to build a web app to display some data. So far I have set up a Flask framework using an SQL database. I am now trying to set up a Dash dashboard. I create the 2 apps and database as follows:
server = Flask(__name__)
app = Dash(__name__, server=server, url_base_pathname='/dashboard/')
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
db = SQLAlchemy(app) # create database
However this throws up the error:
Traceback (most recent call last):
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/run.py", line 1, in <module>
from LightDogs import app
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/LightDogs/__init__.py", line 12, in <module>
db = SQLAlchemy(app) # create database
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 683, in __init__
self.init_app(app)
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 799, in init_app
app.extensions['sqlalchemy'] = _SQLAlchemyState(self)
AttributeError: 'Dash' object has no attribute 'extensions'
Does anyone know how to move past this and successfully create the SQLAlchemy database from the Dash app?
Thanks!
python flask flask-sqlalchemy dashboard dash
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
I am trying to build a web app to display some data. So far I have set up a Flask framework using an SQL database. I am now trying to set up a Dash dashboard. I create the 2 apps and database as follows:
server = Flask(__name__)
app = Dash(__name__, server=server, url_base_pathname='/dashboard/')
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
db = SQLAlchemy(app) # create database
However this throws up the error:
Traceback (most recent call last):
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/run.py", line 1, in <module>
from LightDogs import app
File "/Users/annabernbaum/OneDrive - Imperial College London/Documents/Work/Year 4/Sensing and IoT/Project/SIOT_Project_DE4/Coursework_2/LightDogs/__init__.py", line 12, in <module>
db = SQLAlchemy(app) # create database
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 683, in __init__
self.init_app(app)
File "/Users/annabernbaum/anaconda3/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 799, in init_app
app.extensions['sqlalchemy'] = _SQLAlchemyState(self)
AttributeError: 'Dash' object has no attribute 'extensions'
Does anyone know how to move past this and successfully create the SQLAlchemy database from the Dash app?
Thanks!
python flask flask-sqlalchemy dashboard dash
python flask flask-sqlalchemy dashboard dash
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
edited Jan 2 at 17:34
Anna Bernbaum
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
asked Jan 1 at 23:15
Anna BernbaumAnna Bernbaum
134
134
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Why don't you initializeSQLAlchemyusing flask app, that is,server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?
– Mikhail Berlinkov
Jan 2 at 21:01
add a comment |
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Why don't you initializeSQLAlchemyusing flask app, that is,server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?
– Mikhail Berlinkov
Jan 2 at 21:01
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Why don't you initialize
SQLAlchemy using flask app, that is, server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?– Mikhail Berlinkov
Jan 2 at 21:01
Why don't you initialize
SQLAlchemy using flask app, that is, server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?– Mikhail Berlinkov
Jan 2 at 21:01
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53999681%2fusing-flask-with-sqlalchemy-and-dash%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53999681%2fusing-flask-with-sqlalchemy-and-dash%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Full stacktrace could be helpful.
– Mikhail Berlinkov
Jan 2 at 3:28
Hi Mikhail, I've now added the full traceback
– Anna Bernbaum
Jan 2 at 17:33
Why don't you initialize
SQLAlchemyusing flask app, that is,server.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'; db = SQLAlchemy(server)?– Mikhail Berlinkov
Jan 2 at 21:01