google-book | A Ruby wrapper to the Google Book Search Data API | REST library

Ok. I just found out what went wrong myself and just thought I'd share with anyone who's got the same problem.

My codes were all correct except Heroku doesn't recognise .env and all the secrets saved in .env file will not be picked by Heroku which I wasn't aware of.

The solution is simply go in 'Setting' (in Heroku dashboard) -> Config Vars -> click 'Reveal Config Vars' -> add 'Key' and 'Value' of your secrets (e.g Key: GOOGLE_CLIENT_ID , Value: 'your API Key') then click 'Add'

You can add multiple key, value pairs as you need.

The code below made the following changes:

• For the scipy functions to work, it is best that both index_list and freq_list are numpy arrays, not Python lists. Also, for the power not to overflow too rapidly, these arrays should be of float type (not of int).
• As 0 to a negative power causes a divide-by-zero problem, it makes sense to start the index_list with 1.
• Due to the powers, also for floats an overflow can be generated. Therefore, it makes sense to add bounds to curve_fit. Especially b should be limited not to cross about 50 (the highest value is about power(100000, b) giving an overflow when be.g. is100). Also setting initial values helps to direct the fitting process (p0=...).
• Drawing a plot with index_list as x and power_law(freq_list, ...) as y would generate a very weird curve. It is necessary that the same x is used for the plot and for the function.

Note that calling plt.loglog() changes both axes of the plot to logarithmic. All subsequent plots on the same axes will continue to use the logarithmic scale.

The call to the API is failing, and you're not using functions.https.HttpsError correctly. According to the linked API documentation, the first argument to the constructor must be a FunctionsErrorCode type object, which must be one of the following strings:

"ok" | "cancelled" | "unknown" | "invalid-argument" | "deadline-exceeded" | "not-found" | "already-exists" | "permission-denied" | "resource-exhausted" | "failed-precondition" | "aborted" | "out-of-range" | "unimplemented" | "internal" | "unavailable" | "data-loss" | "unauthenticated"

These strings each map back to an HTTP status code, so you'll have to decide what you're actually telling the client. You probably want "internal" if you just want to indicate a failure that can't be resolved.

You are loading two diferents jQuery versions jquery-2.2.4 and jquery/3.3.1/jquery.js and the version 3 it's loading after the jquery UI. Thats the issue.

I Just remove the jquery-2x and move the jquery3x before the jquery UI. In fact should be work if you just move the jquery-3x before the jquery-UI whitout removing anything.

if you add a console.log in the api save does it run when hitting that url? Even though it returns a 404 it might still be running possibly.

The problem is in the component.html line where you have {{item.volumeInfo.imageLinks.thumbnail}} imageLinks is undefined and you can't get thumbnail of undefined. you have to check if item.volumeInfo.imageLinks != undefined before you get the thumbnail.