Hello dear reader, thank you for adopting version 4.x of the MongoDB Node.js driver, from the bottom of our developer hearts we thank you so much for taking the time to upgrade to our latest and greatest offering of a stunning database experience.
We hope you enjoy your upgrade experience and this guide gives you all the answers you are searching for.
If anything, and we mean anything, hinders your upgrade experience please let us know via JIRA.
We know breaking changes are hard but they are sometimes for the best.
Anyway, enjoy the guide, see you at the end!
Key Changes
Typescript
We've migrated the driver to Typescript!
Users can now harness the power of type hinting and intellisense in editors that support it to develop their MongoDB applications.
Even pure JavaScript projects can benefit from the type definitions with the right linting setup.
Along with the type hinting there's consistent and helpful docs formatting that editors should be able to display while developing.
Recently we migrated our BSON library to TypeScript as well, this version of the driver pulls in that change.
Community Types users (@types/mongodb)
If you are a user of the community types (@types/mongodb) there will likely be compilation errors while adopting the types from our codebase.
Unfortunately we could not achieve a one to one match in types due to the details of writing the codebase in Typescript vs definitions for the user layer API along with the breaking changes of this major version. Please let us know if there's anything that is a blocker to upgrading on JIRA.
Node.js Version
We now require node 12.9 or greater for version 4 of the driver.
If that's outside your support matrix at this time, that's okay!
Bug fix support for our 3.x branch will not be ending until summer 2022, which has support going back as far as Node.js v4!
CRUD results
Our CRUD operations now return the drivers-wide spec-compliant results which are defined here:
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Bumps mongodb from 3.7.3 to 4.1.3.
Release notes
Sourced from mongodb's releases.
... (truncated)
Changelog
Sourced from mongodb's changelog.
... (truncated)
Commits
d9daac5
chore(release): 4.1.37dfe8e8
test: fix evergreen test args (#2993)3aa953c
test(NODE-3236): separate unit from functional (#2991)7998956
docs(NODE-3643): Discuss connection pool size options in 4.0 upgrade guide (#...440517e
fix(NODE-3624): Incorrect default aggregation generic type (#2987)a8e9938
fix(NODE-3609): correct listDatabases return type (#2986)dc3e06a
docs(NODE-3572): note the removal of callbacks from cursor returning function...cd28a8c
docs: fix compatibility urls (#2983)78df6b9
chore(release): 4.1.24353bcf
chore: add note about install Node.js type definitions (#2982)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)