Unable to install express-graphql

Question

I'm trying to install express-graphql but getting this error. Please, help!

npm install --save express-graphql 
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: rest-api@1.0.0
npm ERR! Found: graphql@16.2.0
npm ERR! node_modules/graphql
npm ERR!   graphql@"^16.2.0" from the root project 
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer graphql@"^14.7.0 || ^15.3.0" from express-graphql@0.12.0
npm ERR! node_modules/express-graphql
npm ERR!   express-graphql@"*" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

Same error. Did you find a solution? – thelearner Feb 19 '22 at 21:46 — thelearner, Feb 19 '22 at 21:46
I am facing a similar problem. – codemt Apr 10 '23 at 05:25 — codemt, Apr 10 '23 at 05:25

score 15 · Answer 1 · edited Apr 24 '23 at 09:06

15

Delete the full initialized project then run the following:

npm init -y
npm install express express-graphql
npm install graphql

You should install express-graphql before graphql.

edited Apr 24 '23 at 09:06

Adriaan

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answered Mar 30 '22 at 16:37

Rohan Tomar

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score 5 · Answer 2 · edited Mar 28 '23 at 19:59

5

Uninstall graphql module if it's present. Then install both of them with one command:

npm install graphql express-graphql

edited Mar 28 '23 at 19:59

answered Aug 30 '22 at 12:03

Beqa shekiladze

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score 3 · Answer 3 · answered Jul 03 '22 at 18:55

I generated my app using:

npx express-generator <projectName>

and to solve the issue, I just did:

npm un express graphql

which where modules that I had already installed and then ran:

npm i express-graphql graphql express

in that order worked for me.

score 2 · Answer 4 · edited Mar 30 '23 at 05:20

2

Delete package.json, package-lock.json, & node_modules.
Initialize npm again.
Now, install express-graphql with npm at first (install before any other package in the app).

These steps solve my problem.

edited Mar 30 '23 at 05:20

answered Mar 10 '22 at 09:50

Hemant Soni

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score 1 · Answer 5 · edited Mar 30 '23 at 13:02

1

Can you try deleting package-lock.json? It may help as per the github issue.

edited Mar 30 '23 at 13:02

answered Jan 04 '22 at 07:35

Sajeetharan

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score 1 · Answer 6 · edited Mar 30 '23 at 21:02

1

As stated in the other answers, first remove graphql via:

npm remove graphql

Now install express-graphql with this command:

npm install express-graphql

It works for me.

edited Mar 30 '23 at 21:02

answered Sep 28 '22 at 14:41

Gajen Dissanayake

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score 1 · Answer 7 · edited Mar 29 '23 at 00:49

1

Install in this order:

npm install express-graphql graphql express

edited Mar 29 '23 at 00:49

answered Jan 03 '23 at 09:43

Rupesh

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score 0 · Answer 8 · edited Mar 28 '23 at 17:19

0

Install express-graphql before installing express.

edited Mar 28 '23 at 17:19

answered Mar 08 '22 at 06:37

Amalesh

1

? The OP just failed to install express-graphql, so how he will install before something else ? – Elikill58 Mar 08 '22 at 09:06

score 0 · Answer 9 · answered Apr 16 '22 at 12:31

0

npm install express-graphql --save --force

works for me.

answered Apr 16 '22 at 12:31

Karikaalan

44
5

score 0 · Answer 10 · edited Mar 30 '23 at 18:55

0

I deleted package-lock.json and ran

npm install express-graphql graphql --save

It worked for me.

edited Mar 30 '23 at 18:55

answered Jun 23 '22 at 09:22

Said

1

score 0 · Answer 11 · edited Dec 15 '22 at 16:03

0

I installed graphql then express-graphql, then npm i express --force

edited Dec 15 '22 at 16:03

Tyler2P

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answered Dec 11 '22 at 23:20

Ayo crescent

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score 0 · Answer 12 · edited Mar 30 '23 at 10:12

0

If you try to install express-graphql after graphql, it creates the conflict and that errors you see in the console. According to GraphQL spec, you should use the following modules installation order:

npm install express express-graphql graphql --save

To fix the issues, you should:

Remove graphql
Install express-graphql
Install graphql

edited Mar 30 '23 at 10:12

answered Jan 11 '23 at 18:14

Lotpite

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score 0 · Answer 13 · edited Jan 22 '23 at 18:18

0

STEP 1: Delete package.json, package-lock.json, node_modules and start again.

STEP 2: npm install express express-graphql graphql --save

Apparently installing packages in that order works. Command is copied from GraphQL docs. https://graphql.org/graphql-js/running-an-express-graphql-server/

edited Jan 22 '23 at 18:18

Tyler2P

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answered Jan 20 '23 at 22:34

Akshay Joshi

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score 0 · Answer 14 · answered Aug 13 '23 at 06:38

0

install express-graphql with yarn

install yarn npm install --global yarn
install dependencieyarn add express-graphql
be happy!

answered Aug 13 '23 at 06:38

DanyJerez

1

Unable to install express-graphql

14 Answers14