Netlify Lambda functions: keep getting path must be of type string

Question

I'm using firebase-admin to retrieve data and using Netlify Lambda functions to call the service. This is basically it.

Here is my code:

exports.handler = (event, context, callback) => {
  const { id = "toronto" } = event.queryStringParameters;
  const cityRefs = dbInstance.collection("cities");
  console.log("req.params.id", id);

  if (id === "mumbai") {
    console.log("in here", id);
    let cityRef = cityRefs.doc("id1");
    return cityRef
      .get()
      .then(doc => {
        if (!doc.exists) {
          console.log("No such document!");
        } else {
          console.log("Document data:", doc.data());
          callback(null, {
            statusCode: 200,
            body: doc.data()
          });
        }
      })
      .catch(err => {
        console.log("Error getting document", err);
        callback(err);
      });
    }

}

I keep getting the below error. I'm not exactly sure I'm doing wrong.

Function invocation failed: TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type number

I do see the console log in here but then right after that the error occurs — fscore
– fscore, Commented Jul 1, 2019 at 14:47
You might try wrapping doc.data() in JSON.stringify(). You may also get more responses (and lots of friendly folks) on the Netlify Community! community.netlify.com/c/netlify-platform/functions — Jessica Parsons
– Jessica Parsons, Commented Jul 1, 2019 at 18:45

fscore · Accepted Answer · 2019-07-03 04:49:46Z

5

I figured it out. The reason why it didn't work is because of firebase-admin was being bundled. So I used https://www.npmjs.com/package/webpack-node-externals to bundle firebase-admin. I added this to webpack.functions.js:

const nodeExternals = require("webpack-node-externals");

module.exports = {
  externals: [nodeExternals()]
};

and I run the netlify lambda function with the following command:

"start:lambda": "netlify-lambda serve src/functions --config ./webpack.functions.js"

edited Jul 3, 2019 at 4:49

answered Jul 3, 2019 at 4:12

fscore

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1 Comment

Derit Agustin Over a year ago

when using external got this error "SyntaxError: Cannot use import statement outside a module"

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