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how to correctly deal with promises

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0

$begingroup$

The following function is accepting PUT connection to a server API, checks authorization to write and then performs write to a database.

The eslint linting tool complains saying "avoid nesting promises" and "Each then() should return a value or throw". I'm new to promises and I am not sure how to improve my code.

app.put('/api/v0/note/:id', (req, res) => 
 const id = req.params.id;
 const uid = req.user ? req.user.uid : null;
 return user_can_edit_note(uid, id).then(yes => 
 if (yes) 
 return db.collection('notes').doc(id).update(
 title: req.body.title,
 text: req.body.text,
 author_uid: req.user ? req.user.uid : null,
 updated_on: admin.firestore.Timestamp.now()
 ).then(() => 
 return res.json(
 ok: "ok"
 );
 );
 else 
 return res.status(403).json(
 error: "Permission Denied",
 note_id: id
 );
 
 ).catch((err) => 
 console.error(err);
 return res.status(500).json(error: String(err));
 );
);

promise

share|improve this question

edited 2 mins ago

Emanuele Paolini

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

$endgroup$

add a comment | 

0

$begingroup$

The following function is accepting PUT connection to a server API, checks authorization to write and then performs write to a database.

The eslint linting tool complains saying "avoid nesting promises" and "Each then() should return a value or throw". I'm new to promises and I am not sure how to improve my code.

app.put('/api/v0/note/:id', (req, res) => 
 const id = req.params.id;
 const uid = req.user ? req.user.uid : null;
 return user_can_edit_note(uid, id).then(yes => 
 if (yes) 
 return db.collection('notes').doc(id).update(
 title: req.body.title,
 text: req.body.text,
 author_uid: req.user ? req.user.uid : null,
 updated_on: admin.firestore.Timestamp.now()
 ).then(() => 
 return res.json(
 ok: "ok"
 );
 );
 else 
 return res.status(403).json(
 error: "Permission Denied",
 note_id: id
 );
 
 ).catch((err) => 
 console.error(err);
 return res.status(500).json(error: String(err));
 );
);

promise

share|improve this question

edited 2 mins ago

Emanuele Paolini

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

$endgroup$

add a comment | 

$begingroup$

The following function is accepting PUT connection to a server API, checks authorization to write and then performs write to a database.

The eslint linting tool complains saying "avoid nesting promises" and "Each then() should return a value or throw". I'm new to promises and I am not sure how to improve my code.

app.put('/api/v0/note/:id', (req, res) => 
 const id = req.params.id;
 const uid = req.user ? req.user.uid : null;
 return user_can_edit_note(uid, id).then(yes => 
 if (yes) 
 return db.collection('notes').doc(id).update(
 title: req.body.title,
 text: req.body.text,
 author_uid: req.user ? req.user.uid : null,
 updated_on: admin.firestore.Timestamp.now()
 ).then(() => 
 return res.json(
 ok: "ok"
 );
 );
 else 
 return res.status(403).json(
 error: "Permission Denied",
 note_id: id
 );
 
 ).catch((err) => 
 console.error(err);
 return res.status(500).json(error: String(err));
 );
);

promise

share|improve this question

edited 2 mins ago

Emanuele Paolini

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

$endgroup$

app.put('/api/v0/note/:id', (req, res) => 
 const id = req.params.id;
 const uid = req.user ? req.user.uid : null;
 return user_can_edit_note(uid, id).then(yes => 
 if (yes) 
 return db.collection('notes').doc(id).update(
 title: req.body.title,
 text: req.body.text,
 author_uid: req.user ? req.user.uid : null,
 updated_on: admin.firestore.Timestamp.now()
 ).then(() => 
 return res.json(
 ok: "ok"
 );
 );
 else 
 return res.status(403).json(
 error: "Permission Denied",
 note_id: id
 );
 
 ).catch((err) => 
 console.error(err);
 return res.status(500).json(error: String(err));
 );
);

share|improve this question

edited 2 mins ago

Emanuele Paolini

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

share|improve this question

edited 2 mins ago

Emanuele Paolini

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712

asked 16 mins ago

Emanuele PaoliniEmanuele Paolini

1,9991712