Comments by Mohit Tomar

Mohit Tomar 25-Oct-22 5:17am View

Yes there is ManyToMany annotation but the problem is not due to that. As I also tried running the application after removing all the relation annotations from all the classes and leaving only ID property in each of the pojo class. Still Order Table was not created while other tables were created with only one column i.e. ID. I have also observed that when tables are not present in the dB then also I get the same error (i.e. on the first run) but when I rerun the application it doesn't give any error. I'm not sure if this problem is due to some kind of cache or temporary file that STS maintains. I'm totally confused why I'm getting this error. Any clarification would be much appreciated. Thanks in advance.

Mohit Tomar 25-Oct-22 5:14am View

Thank you for mentioning that, I didn't know such a feature was present.

Mohit Tomar 25-Oct-22 3:59am View

Deleted

Both Saleorder and Order contains the same code. Actually I first created Order and when it didn't work I copy and pasted the code in new class Saleorder, and then it worked. Anyways I'm including the code of Order class below

package com.sportyshoes.entities;

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Order {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;

@ManyToOne(cascade = CascadeType.ALL)
private Customer customer;

@ManyToMany(cascade = CascadeType.ALL)
private List<product> products;
}

Mohit Tomar 25-Oct-22 3:58am View

Deleted

Both Saleorder and Order contains the same code. Actually I first created Order and when it didn't work I copy and pasted the code in new class Saleorder, and then it worked. Anyways I'm including the code of Order class below

package com.sportyshoes.entities;

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Order {
	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	private int id;
	
	@ManyToOne(cascade = CascadeType.ALL)
	private Customer customer;
	
	@ManyToMany(cascade = CascadeType.ALL)
	private List<Product> products;
}

Mohit Tomar 19-Mar-21 23:43pm View

Thanks for posting the link. After reading, things are making more sense now.

Mohit Tomar 19-Mar-21 8:23am View

This approach is also good, and I don't think it is clumsy. In fact, there might be some situations where we have to pass a parameter to a function which is pointer to pointer. Thanks for posting. I find CodeProject more newbie-friendly as compared with StackOverflow.

Mohit Tomar 18-Mar-21 8:26am View

Yes correct. After investing 2 hrs I finally understood why it was not working in the first place. Thanks for your solution.

I'm new to C C++ and programming in general and use to think that when we pass a pointer variable to a function then the function would make the changes directly in the original pointer. Which turns out not to be correct.

So far I understood that if a function has a pointer parameter and a pointer variable is passed to it then both the original pointer variable and the pointer parameter of the function will point to the same memory location. While the function uses the local pointer for making changes to the memory it points to. Changes to its local pointer are lost after the function exits and we must collect the changes from the function after it completes and use that collected value in the original pointer that we passed to the function.

My god it took so long to finally make sense of how pointer and parameters work. I'm sure I won't make any mistakes going forward.

Mohit Tomar 18-Mar-21 3:41am View

Still not sure if I totally understand what is going on. The link you shared talks about local and global variables.

I understand how local and global variables behave. But what if our global variable is a pointer and the function also accepts the pointer and we are passing the pointer to the function as a parameter. This is what I did in the code above.

I don't think in the above case the global and local should make a difference as we are directly referring to the memory instead of calling the variables by name.

Still not clear.

Mohit Tomar 8-May-19 12:23pm View

I have plenty of time that's why.

Mohit Tomar 8-May-19 12:22pm View

Yes, correct I needed to stop at the middle of the array and should have used a separate array for printing the elements of the array.

I used the variable now as a < n/2 and it is working now.

Thanks again

Mohit Tomar 13-Oct-18 0:43am View

Ooohh Okay... finally I understand now why my code was not working. So I was comparing char codes with int num values, and the system was converting chars to num representation as per ASCII and that's why it was not working. Hmmmm... alright... Thanks for your help .. I really appreciate it. And it is working now... Above all, I learned something new and that is priceless. :-)

Mohit Tomar 13-Oct-18 0:23am View

Thanks.. :-)

Mohit Tomar 11-Oct-18 7:18am View

However I was wondering, shouldn't the loop break when it reaches at -----if (wordUpper[wrdIdx] == wordUpper.Length - 1) ----- because at this time the value of both the wordUpper[wrdIdx] and wordUpper.Length - 1 becomes same.

Mohit Tomar 10-Oct-18 3:53am View

Is there any beginner friendly Debugging tutorial that I can refer to?? Actually, its been only one month since I started with C# so my knowledge is very very limited.

Mohit Tomar 4-May-18 7:40am View

Thanks for your reply and pointing out the improvement. I haven't read the chapter on Lists yet, but now as you have mentioned how useful it can be, I will pay more attention to it.

However, I copied my code and made some adjustments and incorporated BigIntegers into it, also increased the array size to that of a QWORD (found the word "QWORD" in my Windows 10 programmers' calculator) hehe... :-) :-) and made the array 64 elements long.. :-) :-)

So after the adjustments, the array was 64bit long and the code successfully displayed the binaries of numbers bigger than 255.

The biggest number it can now convert to binary is is:

Decimal = 9,999,999,999,999,999,999

Binary = 1000101011000111001000110000010010001001111001111111111111111111

I know whatever I'm typing might not be the most efficient code but I will try to keep improving.

Thanks for your help.. :-)

Mohit Tomar 3-May-18 5:24am View

Thanks for the links :-)

Mohit Tomar 2-May-18 8:02am View

I have checked the link. I found all the links useful. Thanks :-) :-)

Mohit Tomar 2-May-18 8:00am View

Thanks for your efforts in trying to help me out. I like the Bicycle example, that one fits in my situation. I know I'm hurrying a little bit, I should slow down now, and after your reply, my mind is at ease. Coding is totally a new concept for me. I will give some time to myself to slowly absorb it.

Thanks for your help..

Mohit Tomar 2-May-18 6:49am View

What about Data Structures and Algorithms? Learning it would improve logic development or not? And is there something programmers follow like some principles or best practices that make their job easier while they are programming?

I know that I have just started with coding and I should be more patient with my speed in grasping new concepts. But just thought that I should ask it.

Comments by Mohit Tomar (Top 19 by date)