Unable to access views on CouchDB

[Lars]

I'm doing some dockerized code in Python (3.5) and flask (1.1.1) working against a CouchDB database (2.3.1) using the cloudant python extension (2.12.0).

I'm trying to fetch and use a view from the database, but it is not working. I can fetch documents, and work with the database normally, but I can't use the view.

I've added a print statement for the object that should hold the design document at the program start, and I see that the document shows as having no views (or anything at all) AND the CouchDB log shows NO requests for the design document being made.

I also tried to both get the design document and use the view via curl using the same URL and username/password, and both actions work successfully.

Here's sample code that fails:

from flask import Flask, render_template , request, g
from cloudant.client import CouchDB
from cloudant.view import View
from cloudant.design_document import DesignDocument
import requests

application = Flask(__name__)
application.config.from_pyfile("config.py")

couch = CouchDB(application.config['COUCHDB_USER'], application.config['COUCHDB_PASSWORD'], url=application.config['COUCHDB_SERVER'], connect=True, auto_renew=True)
database = couch[application.config['COUCHDB_DATABASE']]
views = DesignDocument(database, '_design/vistas')
print(views)
print(views.list_views())

@application.route("/", methods=['GET', 'POST'])
def index():
        for pelicula in View(views,'titulos_peliculas'):
            titulos.append({ "id": pelicula['id'], "titulo": pelicula['key'] })
        return render_template('menu.html',titulos=titulos)

In that code, the print of the design document (views) returns:

{'lists': {}, 'indexes': {}, 'views': {}, 'shows': {}, '_id': '_design/vistas'}

With empty views as show... And the CouchDB log only shows the login to the database and getting the DB info:

couchdb:5984 172.23.0.4 undefined POST /_session 200 ok 69
couchdb:5984 172.23.0.4 vmb_web HEAD //peliculas 200 ok 232

No other queries at all.

No errors in the app log either. Even when I call the routed use of the views:

[pid: 21|app: 0|req: 1/1] 172.23.0.1 () {52 vars in 1225 bytes} [Mon Aug  5 15:03:24 2019] POST / => generated 1148 bytes in 56 msecs (HTTP/1.1 200) 2 headers in 81 bytes (1 switches on core 0)

And, as I said, I can get, and use the document:

curl http://vmb_web:password@127.0.0.1:999/peliculas/_design/vistas

{"_id":"_design/vistas","_rev":"1-e8108d41a6627ea61b9a89a637f574eb","language":"javascript","views":{"peliculas":{"map":"function(doc) {         if (doc.schema == 'pelicula') {            emit(doc.titulo, null);            for(i=0;i<doc.titulos_alt.length;i++) {                emit(doc.titulos_alt[i],null);            }            for(i=0;i<doc.directores.length;i++) {                emit(doc.directores[i].nombre,null);            }            for(i=0;i<doc.actores.length;i++) {                emit(doc.actores[i].nombre,null);            }            for(i=0;i<doc.escritores.length;i++) {                emit(doc.escritores[i].nombre,null);            }            for(i=0;i<doc.etiquetas.length;i++) {                emit(doc.etiquetas[i],null);            }        }        }"},"titulos_peliculas":{"map":"function(doc) {         if ((doc.schema == 'pelicula') && (doc.titulo)) {            emit(doc.titulo, null);        }        }"},"archivos_peliculas":{"map":"function(doc) {         if ((doc.schema == 'pelicula') && (doc.titulo)) {            emit(doc.titulo, doc.archivo);        }        }"},"titulo_rev":{"map":"function(doc) {         if ((doc.schema == 'pelicula') && (doc.titulo)) {            emit(doc.titulo, doc._rev);        }        }"}}}

[emlaver]

Hello @Lars, you'll need to first fetch the design document from the server:

ddoc_with_view = DesignDocument(database, '_design/vistas')
ddoc_with_view.fetch()

You can also use the recommended database helper method get_view_result.

[Lars]

Thank you for your help, it is indeed, as you say.