BookLibrary | Simple Book library application written on flask | Database library
kandi X-RAY | BookLibrary Summary
kandi X-RAY | BookLibrary Summary
Simple Book library application written on flask with SQLite database.
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Top functions reviewed by kandi - BETA
- Borrowing Book
- Checks if the number can be forested
- Return True if the book can derive the number
- Return the borrowing history for a given book
- View function
- Verify a given password
- Decorator to require a permission to be permitted
- Decorator that ensures that the user has the given permission
- Checks if the user is an administrator
- Return whether the user has the given permissions
- Return the URL for the avatar
- Determines if the number can be dragged
- Returns True if this book can be added to the book
BookLibrary Key Features
BookLibrary Examples and Code Snippets
Community Discussions
Trending Discussions on BookLibrary
QUESTION
Suppose I have 3 tables like this:
authorGenres (authorGenreId, authorId, isPublished)
bookLibrarys (bookLibraryId, authorGenreId, bookId)
bookList (bookId, authorId)
I created a trigger, that fires when a row is updated in authorGenres and the isPublished column is set to 1.
When that happens, the trigger INSERTS a row into the bookLibrarys table where the authorGenreId column is set to the row that was updated in authorGenres
Here is my working trigger:
...ANSWER
Answered 2020-Nov-05 at 19:29Try it with LEFT JOIN to check if same record already exist, and make sure to have a code that works on multiple rows as @Lamu suggested to you in comments.
Something like this:
QUESTION
I am working on simple bookLibrary project in Vaadin 8 and Spring. I am struggling with injecting service class into UI components. It gives me nullPointerExceptionMessage all the time. I do not use "new" to create service anywhere.
Here is LibraryService class:
...ANSWER
Answered 2019-Dec-19 at 15:55you can inject service class like
QUESTION
Let me say I have a Book Library with a list of Book. A Book has a List of Page. Page has a list of Line.
In JSF, i'm trying to display all the lines, now I'm using or to iterate through the lists. When I'm on second level of hierarchy which is page, instead of showing the properties of page as lines, netbeans only show the properties of book again as available properties
ANSWER
Answered 2019-Aug-07 at 20:44Yes, I now found out that it works if I add the field manually. Its the code completion that's leading me to believe my code is wrong
QUESTION
I have objects of different classes and would like to store them in a single collection in MongoDB.
I'm using asp.net core 2.2 with MongoDB.Driver 2.8.0 and MongoDB 4.0.5. I've done some attempts.
The idea: I can store all below objects in a single collection. Currently I can save them but I'm not able to read them -> getting
"FormatException: Element '_id' does not match any field or property of class Mongo2.Models.MongoEntity." but only after re-running application. On empty database I can save object and retrieve them. When I close the app and don't drop the db then getting exception on collection.Find(book => true).ToList();
}
I guess I'm missing some steps or my approach is not valid - couldn't find any workable examples over the internet.
Any help will be much appreciated. Either by sharing links to working solutions / examples or here.
Model:
...ANSWER
Answered 2019-Apr-17 at 07:33The problem is with the Id field. You made it custom, but MongoDB will always store your ID property as _id inside the DB and this cannot be changed. Trying to alter the name using BsonElementAttribute will be simply ignored.
To solve your problem you can try the following:
- Add attribute on
CategoryId(and others ids fields too) withBsonElement, but I'm not sure if it works. - Change
CategoryIdtoId(and others ids fields too)
QUESTION
I am developing a simple application in Spring and I just encountered this common problem, but for which I can find no solution, since the ones mentioned in other posts aren't working for some reason.
The error triggers when I run the application for the first time, and this is what it says:
...ANSWER
Answered 2019-Jan-29 at 23:07I found the problem after searching for more answers. Looks like the fact that the following dependency
QUESTION
i have a code that stores the number of books in arraylist, every time a book is borrowed the user is prompted to input a number starting from zero which represents the first book and 1 for the second and so on. it runs at first deleting the first object from the arraylist, then when it gets to the last, it throws an IndexOutOfBoundException, here's my block of code, please help!
...ANSWER
Answered 2018-Aug-05 at 16:13My first observation is that numOfBooks in setUpLibrary() should be set to 3. or should be updated as the size of the array list. The second observation is that in borrowbook(), while loop runs until the bookLib becomes empty. So line booklib.remove(index); will throw error IndexOutOfBoundsException when there are no more elements or the number given by the user is out of range.
Please refer below documentation: https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html#remove(int)
QUESTION
Hi I am a quite beginner in java.
Is it a good way to create construcors with many parameters like in my BookLibrary program?
...ANSWER
Answered 2018-Apr-12 at 10:16As others already said in comments, using the Builder Pattern would be an option. But if not done properly, that introduces the risk of creating incomplete objects.
But there are more ways to improve your design. E.g. you pass names and surnames (and a full name in case of the director - why only there?) as separate Strings. I'd create a PersonName class that encapsulates these different naming elements, so your constructor becomes:
QUESTION
so i have two classes - one is a book library that is implemented as a doubly linked list and the other class is a DLL node class for a book node which is this:
...ANSWER
Answered 2017-Oct-21 at 00:12If you are passing in all of the arguments to add_book() that you would to the class Book, this is your problem. It is only expecting one argument, book, but I assume you are passing in all of the arguments that class Book expects.
You are better off instantiating your book objects first and then passing them directly into your add_book method.
QUESTION
....
.state('books', {
url: '/book/chapter/:chap',
templateUrl: "views/chapter.html",
params: { chap: .........}
})
ANSWER
Answered 2017-Sep-05 at 20:02There are multiple questions here so to start with your state parameters. In the state params you can declare default values for params in a state like so.
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