I have searched and was unable to find a way to display checkboxes in my view. I have 2 entities: Assignment and Chore which is a one-to-many relationship (one assignment, many chores)
public class Chore
{
public System.Guid ChoreId { get; set; }
public string ChoreName { get; set; }
public string Description { get; set; }
public int PointValue { get; set; }
}
public class Assignment
{
public int AssignmentId { get; set; }
public System.Guid RecipientId { get; set; }
public Nullable<bool> Completed { get; set; }
public System.DateTime AssignedDate { get; set; }
public Nullable<System.DateTime> CompletedDate { get; set; }
public virtual IEnumerable<Chore> Chores { get; set; }
}
How can I display a list of all possible chores That I can select whenever I want to create an assignment?
Related
I work on an API and when I want to get data from a many-to-many relationship, I get back null.
The connection with the database is OK, and Post date work.
But when I get info from the database, the table for the many-to-many relationship is empty
public class User
{
[Key]
public int Id { get; set; }
[Required]
[MaxLength(30)]
public string Pseudo { get; set; }
[EmailAddress]
public string Mail { get; set; }
[Required]
public string Pwd { get; set; }
[Required]
public bool IsAdmin { get; set; }
public ICollection<Project> UsersProjectstry { get; set; }
public ICollection<UserProjectMTM> UsersProjects { get; set; }
}
public class Project
{
[Key]
public int Id { get; set; }
[Required]
[MaxLength(30)]
public string Name { get; set; }
[Required]
[MinLength(100)]
public string Description { get; set; }
public string? img { get; set; }
[Required]
public DateTime StartDate { get; set; }
[Required]
public DateTime EndDate { get; set; }
[Required]
public int SumGoal { get; set; }
public int Sum { get; set; }
[Required]
public User ProjectManager { get; set; }
public ICollection<UserProjectMTM> Donator { get; set; }
}
public class UserProjectMTM
{
public int PId { get; set; }
public Project Project { get; set; }
public int UId { get; set; }
public User User { get; set; }
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfiguration(new ProjectConfig());
modelBuilder.ApplyConfiguration(new UserConfig());
modelBuilder.ApplyConfiguration(new CommentConfig());
modelBuilder.Entity<UserProjectMTM>().HasKey(x => new { x.UId, x.PId });
modelBuilder.Entity<UserProjectMTM>().HasOne(p=> p.Project).WithMany(u=> u.Donator).HasForeignKey(x=>x.PId);
modelBuilder.Entity<UserProjectMTM>().HasOne(u => u.User).WithMany(p=> p.UsersProjects).HasForeignKey(x => x.UId);
}
public IEnumerable<TEntity> GetAll()
{
return _Context.Set<TEntity>();
}
public TEntity? GetById(params object[] Id)
{
return _Context.Set<TEntity>().Find(Id);
}
I try a lot of things - so far without success.
I'm junior and I can't find the solution - please help.
I have a complex model with multiple levels, i am using Swashbuckle.
how can I ignore related models in swagger UI? and show just the first level of the model?
See the below example, I want to ignore all relations like JobTitleVM and ICollection.
public class UserVM
{
public int Id { get; set; }
public Guid Guid { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Token { get; set; }
public string Avatar { get; set; }
public int IsActive { get; set; }
public int JobTitleId { get; set; }
public JobTitleVM JobTitle { get; set; }
public int UserStatusId { get; set; }
public UserStatusVM UserStatus { get; set; }
public virtual ICollection<UserStepsVM> UserSteps { get; set; } = new List<UserStepsVM>();
}
I am working on modeling a Contact Info Structure and haven't quite figured out how the relationships should be coded with EF Core. I am fairly new to using EF for data access layer.
I want to have a contact model which can contain Website, Phonenumbers, Emails, or Social Info. Then the contact info will be added to several different models. Any suggestions would be helpful, I am not sure how code this One to many with many table relationship or if it is even possible using EF.
Models so far
public class Contact
{
public String Id { get; set; }
public Int32 ContactType { get; set; } //Enum for Website, Phonenumbers, Emails, or Social
public String RecId { get; set; } //FK to multiple Models
public String RecType { get; set; }//Value for which model the RecID is for
public String Name { get; set; }
public String Value { get; set; }
}
public class ContactInfo
{
public virtual IList<Contact> Website { get; set; }
public virtual IList<Contact> PhoneNumbers { get; set; }
public virtual IList<Contact> Emails { get; set; }
public virtual IList<Contact> Socials { get; set; }
}
//Example of models to use the contact model
public class Company
{
....
pubic ContactInfo ContactInfo { get; set;}
}
public class Client
{
....
pubic ContactInfo ContactInfo { get; set;}
}
If I understand your question correctly, then you could use following code sample, but it is not exactly what you are trying to achieve. This may give you some understanding what you need to do with EF.
public class Contact
{
public String Id { get; set; }
public ContactType ContactType { get; set; } //Enum for Website, Phonenumbers, Emails, or Social
public String RecId { get; set; } //FK to multiple Models (This can't be the FK to multiple table as it should be FK for one table so that FK for Company would be CompanyId, FK for the Client should ClientId)
public String RecType { get; set; }//Value for which model the RecID is for (This need to rethink as it may not needed.)
public String Name { get; set; }
public String Value { get; set; }
// One to Many Relationship
public string CompanyId? { get; set; }
public string ClientId? { get; set; }
public Company Company { get; set; }
public Client Client { get; set; }
}
public class Company
{
public String Id { get; set; }
// Other properties
// One to Many Relationship
public ICollection<Contact> Contacts { get; set; }
}
public class Client
{
public String Id { get; set; }
// Other properties
// One to Many Relationship
public ICollection<Contact> Contacts { get; set; }
}
/* Db context */
public class YourDbContext : DbContext
{
public YourDbContext(DbContextOptions<YourDbContext> options)
: base(options)
{
}
public virtual DbSet<Contact> Contacts { get; set; }
public virtual DbSet<Company> Companies { get; set; }
public virtual DbSet<Client> Clients { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<Contact>().HasKey(t => t.Id);
modelBuilder.Entity<Company>().HasKey(t => t.Id);
modelBuilder.Entity<Company>().HasMany(c => c.Contacts).WithOne(c => c.Company).HasForeignKey(k => k.CompanyId);
modelBuilder.Entity<Client>().HasKey(t => t.Id);
modelBuilder.Entity<Client>().HasMany(t => t.Contacts).WithOne(c =>c.Client).HasForeignKey(k => k.ClientId);
}
}
/* Db context - Endd */
public enum ContactType
{
Website,
PhoneNumbers,
Emails,
Social
}
Let me know if you need anymore information.
With the help from DSR, this is the solution I have (untested).
public class Company
{
public String Id { get; set; }
public String Name { get; set; }
public ICollection<ContactPhone> PhoneNumbers { get; set; }
public ICollection<ContactEmail> ContactEmail { get; set; }
public ICollection<ContactWebsite> ContactWebsite { get; set; }
public ICollection<ContactSocial> ContactSocial { get; set; }
}
public class Client
{
public String Id { get; set; }
public String Name { get; set; }
public ICollection<ContactPhone> PhoneNumbers { get; set; }
public ICollection<ContactEmail> ContactEmail { get; set; }
public ICollection<ContactWebsite> ContactWebsite { get; set; }
public ICollection<ContactSocial> ContactSocial { get; set; }
}
public class ContactWebsite
{
public String Id { get; set; }
public String Url { get; set; }
public Company Company { get; set; }
public Client Client { get; set; }
}
public class ContactPhone
{
public String Id { get; set; }
public String Type { get; set; }
public String Number { get; set; }
public Company Company { get; set; }
public Client Client { get; set; }
}
public class ContactEmail
{
public String Id { get; set; }
public String Category { get; set; }
public String Email { get; set; }
public Company Company { get; set; }
public Client Client { get; set; }
}
public class ContactSocial
{
public String Id { get; set; }
public String Site { get; set; }
public String Handle { get; set; }
public Company Company { get; set; }
public Client Client { get; set; }
}
I'm still new in creating Models using Entity Framework and MVC 4 Razor. I'm having a problem on how can I save a history of a model. How can I create a model that have a history on specific tables or fields ? For ex: If I wish to create a history on the changes on the school. Its still not clear to me how will I I create the model that saves history. How will be the triggering do I have to execute the save function on different models with the same data ?
Thank you so much in advance.
If anyone could be a simple example of model and a model history and how it is functioning, I'll be very grateful. Like a Sales or sales history.
Here's my code
One To Many
public class Child
{
[Key]
public int ChildID { get; set; }
[Required,Display(Name="Project Code")]
public string ProjectCode { get; set; }
public string Status { get; set; }
[DataType(DataType.Date)]
public DateTime StatusDate { get; set; }
public string FamilyName { get; set; }
public string GivenName { get; set; }
public string MiddleName { get; set; }
[DataType(DataType.Date)]
public DateTime Birthdate { get; set; }
public string Gender {get;set;}
public string Address { get; set; }
public string Section { get; set; }
public int SchoolLevelID { get; set; }
public int SchoolYearID { get; set; }
public int AreaID { get; set; }
public int SchoolID { get; set; }
public int GradeLevelID { get; set; }
//Foreign Key - One to Many
public virtual SchoolLevel SchoolLevel { get; set; }
public virtual SchoolYear SchoolYear { get; set; }
public virtual Area Area { get; set; }
public virtual School School { get; set; }
public virtual GradeLevel GradeLevel{get;set;}
//Child is foreign key at the table
public virtual ICollection<Guardian> Guardians { get; set; }
}
public class SchoolLevel
{
public int SchoolLevelID { get; set; }
public string SchoolLevelName { get; set; }
public virtual ICollection<Child> Children { get; set; }
}
public class SchoolYear
{
public int SchoolYearID { get; set; }
public string SchoolYearName { get; set; }
public virtual ICollection<Child> Children{get;set;}
}
public class Area
{
public int AreaID{get;set;}
public string AreaName { get; set; }
public virtual ICollection<Child> Children{get;set;}
}
public class School
{
public int SchoolID { get; set; }
public string SchoolName{get;set;}
public virtual ICollection<Child> Children { get; set; }
}
public class GradeLevel
{
public int GradeLevelID{get;set;}
public string GradeLevelName { get; set; }
public virtual ICollection<Child> Children { get; set; }
}
public class ChildDbContext : DbContext
{
public DbSet<Child> Children { get; set; }
public DbSet<SchoolLevel> SchoolLevels { get; set; }
public DbSet<SchoolYear> SchoolYears { get; set; }
public DbSet<Area> Areas { get; set; }
public DbSet<School> Schools { get; set; }
public DbSet<GradeLevel> GradeLevels { get; set; }
public DbSet<Guardian> Guardians { get; set; }
}
You can use this approach: Create a History model. That contains 1 changeness like o log.
public class History
{
public int HistoryId { get; set; }
public int ModelType { get; set; } //it is ModelTypeEnum value.
public int ModelId { get; set; }
public string PropertyName { get; set; }
public string Propertyvalue {get;set;}
public DateTime ChangeDate { get; set; }
public int ChangedUserId { get; set; }
}
And Enum:
public enum ModelTypeEnum
{
Child =1,
SchoolLevel = 2,
//etc..
};
For example, when you edit 1 Child entity, give changed properties name and value, it's id, type and others (ChangeDate, ChangedUserId) to History and save histories. If 3 properties will change you should save 3 history entities. Then, you can load (filter) histories by ModelId, by ChangedUserId etc.
I a am new to entity framework. I have created project with Entity Model. When i am trying to add item in to the table it gives error "Multiplicity Constraint violated" Any idea?
ID From Table MAPPER is FK in MAPS table.
In Code Behind:
private Mapper mMapper;
if (mMapper.Id == 0)
db.Mappers.Add(mMapper);
db.SaveChanges();
public partial class Mapper
{
public Mapper()
{
this.Maps = new HashSet<Map>();
}
public int Id { get; set; }
public string Name { get; set; }
public string RecordDelimiter { get; set; }
public string ValueDelimiter { get; set; }
public Nullable<int> ColumnDescriptionRow { get; set; }
public Nullable<int> FirstRowOfData { get; set; }
public Nullable<bool> IgnoreThisRecord { get; set; }
public Nullable<bool> ExplodePartQuantity { get; set; }
public Nullable<bool> IgnoreImportingErrors { get; set; }
public Nullable<int> AngleMappingLeadingEdgeId { get; set; }
public Nullable<int> AngleMappingTrailingEdgeId { get; set; }
public string ValueWrapper { get; set; }
public string ValueWrapperDelimiter { get; set; }
public virtual AngleMapping AngleMapping { get; set; }
public virtual AngleMapping AngleMapping1 { get; set; }
public virtual ICollection<Map> Maps { get; set; }
}
Help Appreciated!