Dgraph: Dgraph tutorial blog post #1 is invalid.

[ShawnMilo]

What version of Dgraph are you using?

Built at 2019-10-03T13:07:27.362Z
Commit: 7f20b78
Commit Info: 7f20b78 Thu Oct 3 06:06:38 2019 -0700 (HEAD -> master, origin/master, origin/HEAD)

Have you tried reproducing the issue with the latest release?

Yes.

What is the hardware spec (RAM, OS)?

Ubuntu 19.04, i3 window manager, 64 GB of RAM, Intel i7-6700K.
Kernel: Linux gc 5.0.0-29-generic #31-Ubuntu SMP Thu Sep 12 13:05:32 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Steps to reproduce the issue (command/config used to run Dgraph).

Follow the tutorial here _exactly_:
https://blog.dgraph.io/post/tutorial-1-getting-started/

Expected behaviour and actual result.

Running the very first query should work, but instead I receive an error about a double-quote (unicode character 22) being an "unrecognized character". This happens whether I manually type in the example or copy/paste the example. I've tried both examples (the first one that says "do not run this yet" and the modified version below it).

Error Name: t

Message: while lexing {
  "set": [
    {
      "name": "Karthic",
      "age": 28
    },
    {
      "name": "Jessica",
      "age": 31
    }
  ]
} at line 2 column 2: Unrecognized character in lexText: U+0022 '"'

URL: http://localhost:8080/query?timeout=60s&debug=true

[hackintoshrao]

Hey @ShawnMilo ,

Can you check that you're running it from the mutation tab, not from the query tab?

Let me know.

[ShawnMilo]

@hackintoshrao: I was running it from the Query tab, as displayed in all the screenshots prior to the text.

I see now that the animated gif (which I had ignored earlier) shows clicking from Query to Mutate very briefly before pasting in the text, and the prose above clearly says to "go to the Mutate tab."

Running from the Mutate tab works. Thank you!

[hackintoshrao]

Glad that you opened up an issue and discussed it :) Please do follow up with the next episodes and give us your feedback.

[kesor]

@hackintoshrao I was also stumped by this. Took me some googling and finding this issue to realize that I was doing something "wrong". IMHO the usability of this "Query" vs. "Mutation" tab is unintuitive, thus people get confused and seeing this weird error about the " being wrong is not helping.