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How to pass arguments into redirect(url_for()) of Flask?

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Sometimes, we want to pass arguments into redirect(url_for()) of Flask.

In this article, we’ll look at how to pass arguments into redirect(url_for()) of Flask.

How to pass arguments into redirect(url_for()) of Flask?

To pass arguments into redirect(url_for()) of Flask, we define the destination route to get the request parameters.

Then we can call url_for with the parameters.

For instance, we write

@app.route("/found/<email>/<list_of_objects>")
def found(email, list_of_objects):
    return render_template("found.html", keys=email, obj=list_of_objects)

to add the /found/<email>/<list_of_objects> route that maps to the found function.

In it, we get the the URL parameters from the found function’s parameters.

Then in another route, we write

return redirect(url_for("found", email=x, list_of_objects=y))

to call url_for with the route name and the parameters to return the URL for the /found/<email>/<list_of_objects> route with the parameters filled in.

Then we call redirect with the URL to redirect to the /found/<email>/<list_of_objects> route.

Conclusion

To pass arguments into redirect(url_for()) of Flask, we define the destination route to get the request parameters.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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