UnhandledPromiseRejectionWarning: TypeError: Cannot convert object to primitive value

What did you do

Running as NPM script: jsonschema2md -o docs/ -x docs/ -d schemas/ -e json

What did you expect to happen

No warnings of unhandled promise rejections.

What happened

Note: I reference unloaded JSON schemas of another project.

(node:23354) UnhandledPromiseRejectionWarning: TypeError: Cannot convert object to primitive value
    at makeconstraintssection (/Users/axawinterthur/dev/aletheia/node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:590:33)
    at Object.entries.map (/Users/axawinterthur/dev/aletheia/node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:715:14)
    at Array.map (<anonymous>)
    at makeproplist (/Users/axawinterthur/dev/aletheia/node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:705:54)
    at makeproperties (/Users/axawinterthur/dev/aletheia/node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:819:12)
    at foldl (/Users/axawinterthur/dev/aletheia/node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:843:10)
    at each (/Users/axawinterthur/dev/aletheia/node_modules/ferrum/src/sequence.js:984:12)
    at curry (/Users/axawinterthur/dev/aletheia/node_modules/ferrum/src/sequence.js:582:5)
    at each [CURRY] (/Users/axawinterthur/dev/aletheia/node_modules/ferrum/src/functional.js:169:12)
    at curry (/Users/axawinterthur/dev/aletheia/node_modules/ferrum/src/sequence.js:983:3)
(node:23354) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:23354) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

What’s your environment

• Operating System: macOS Catalina 10.15.2 (19C57)
• node.js version: v10.15.0

Do you have example files:

Sorry, not publicly available for this.

I have the full log only:

> jsonschema2md -o docs/ -x docs/ -d schemas/ -e json

loading 53 schemas
cannot resolve http://jsonlogic.com/schemas/json-logic.json
cannot resolve http://jsonlogic.com/schemas/json-logic.json
writing schemas
writing schemas to .../docs
writing README
building readme
writing documentation
generating markdown
(node:23354) UnhandledPromiseRejectionWarning: TypeError: Cannot convert object to primitive value
    at makeconstraintssection (.../node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:590:33)
    at Object.entries.map (.../node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:715:14)
    at Array.map (<anonymous>)
    at makeproplist (.../node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:705:54)
    at makeproperties (.../node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:819:12)
    at foldl (.../node_modules/@adobe/jsonschema2md/lib/markdownBuilder.js:843:10)
    at each (.../node_modules/ferrum/src/sequence.js:984:12)
    at curry (.../node_modules/ferrum/src/sequence.js:582:5)
    at each [CURRY] (.../node_modules/ferrum/src/functional.js:169:12)
    at curry (.../node_modules/ferrum/src/sequence.js:983:3)
(node:23354) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:23354) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
.../docs/README.md created

[trieloff]

Yes, that’s exactly what’s happening. I can fix this.

[AndyOGo]

@trieloff Thanks again for your quick help.

I have more output now, though another unhandled promise rejection. We use other keywords as keys too, e.g. object type properties or array type items keywords, but those are all not primitives… 🤔

(node:26127) UnhandledPromiseRejectionWarning: TypeError: Cannot convert object to primitive value
    at String (<anonymous>)
    at longestStreak (/Users/axawinterthur/dev/aletheia/node_modules/longest-streak/index.js:16:11)
    at Of.inlineCode (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/visitors/inline-code.js:30:39)
    at Of.one [as visit] (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/macro/one.js:19:30)
    at Of.all (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/macro/all.js:14:27)
    at Of.tableCell (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/visitors/table-cell.js:8:15)
    at Of.one [as visit] (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/macro/one.js:19:30)
    at Of.all (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/macro/all.js:14:27)
    at Of.table (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/visitors/table.js:44:26)
    at Of.one [as visit] (/Users/axawinterthur/dev/aletheia/node_modules/remark-stringify/lib/macro/one.js:19:30)
(node:26127) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:26127) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.