I'm developing a simple iOS application with the following database setup. There is an Athlete entity which has a many to many relationship with Workout. Workout has a to many relationship with Workout Scores. Athlete<<->>Workout<->>Workout_Scores. I think i've set up my model incorrectly though. I was thinking athletes can share workouts (e.g. multiple athletes have the same workout object), or, an exercise may be exclusive to one person. However, the exercise score is strictly for one athlete, not shared. You can have up to 1 score for each workout. 2 athletes can have the same workout, but their score should be separate. Did I set up my model correctly? Should the score entity be related to athlete, not workout?
iOS - Many-to-Many data confusion?
66 Views Asked by Josue Espinosa At
1
There are 1 best solutions below
Related Questions in IOS
- Two different numbers in an array which their sum equals to a given value
- Given two arrays of positive numbers, re-arrange them to form a resulting array, resulting array contains the elements in the same given sequence
- Time complexity of the algorithm?
- Find a MST in O(V+E) Time in a Graph
- Why k and l for LSH used for approximate nearest neighbours?
- How to count the number of ways of choosing of k equal substrings from a List L(the list of All Substrings)
- Issues with reversing the linkedlist
- Finding first non-repeating number in integer array
- Finding average of an array
- How to check for duplicates with less time in a list over 9000 elements by python
Related Questions in SQL
- Two different numbers in an array which their sum equals to a given value
- Given two arrays of positive numbers, re-arrange them to form a resulting array, resulting array contains the elements in the same given sequence
- Time complexity of the algorithm?
- Find a MST in O(V+E) Time in a Graph
- Why k and l for LSH used for approximate nearest neighbours?
- How to count the number of ways of choosing of k equal substrings from a List L(the list of All Substrings)
- Issues with reversing the linkedlist
- Finding first non-repeating number in integer array
- Finding average of an array
- How to check for duplicates with less time in a list over 9000 elements by python
Related Questions in DATABASE
- Two different numbers in an array which their sum equals to a given value
- Given two arrays of positive numbers, re-arrange them to form a resulting array, resulting array contains the elements in the same given sequence
- Time complexity of the algorithm?
- Find a MST in O(V+E) Time in a Graph
- Why k and l for LSH used for approximate nearest neighbours?
- How to count the number of ways of choosing of k equal substrings from a List L(the list of All Substrings)
- Issues with reversing the linkedlist
- Finding first non-repeating number in integer array
- Finding average of an array
- How to check for duplicates with less time in a list over 9000 elements by python
Related Questions in CORE-DATA
- Two different numbers in an array which their sum equals to a given value
- Given two arrays of positive numbers, re-arrange them to form a resulting array, resulting array contains the elements in the same given sequence
- Time complexity of the algorithm?
- Find a MST in O(V+E) Time in a Graph
- Why k and l for LSH used for approximate nearest neighbours?
- How to count the number of ways of choosing of k equal substrings from a List L(the list of All Substrings)
- Issues with reversing the linkedlist
- Finding first non-repeating number in integer array
- Finding average of an array
- How to check for duplicates with less time in a list over 9000 elements by python
Related Questions in ERD
- Two different numbers in an array which their sum equals to a given value
- Given two arrays of positive numbers, re-arrange them to form a resulting array, resulting array contains the elements in the same given sequence
- Time complexity of the algorithm?
- Find a MST in O(V+E) Time in a Graph
- Why k and l for LSH used for approximate nearest neighbours?
- How to count the number of ways of choosing of k equal substrings from a List L(the list of All Substrings)
- Issues with reversing the linkedlist
- Finding first non-repeating number in integer array
- Finding average of an array
- How to check for duplicates with less time in a list over 9000 elements by python
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
It sounds like you want to use Workout_Scores as a sort of join table (although that of terminology isn't appropriate for an object-graph framework like CoreData). Your Workout_Scores entity should have two to-one relationships to Athlete and Workout. Athlete should have a to-many relationship to Workout_Score (an athlete may have many workout scores), and Workout should have a to-many relationship to WorkoutScore (a workout may have many workout scores that originated from a single or from many different athletes).
Here's what I propose for your data model: