How insert multiple value in Intermediate table through API - linq

Question

I use to add value from the VUEJS where write code like this.
<multiselect v-model="schoolTypeform.schoolTypeId" :options="SchoolTypes" :multiple="true" :close-on-select="false" :clear-on-select="false" :preserve-search="true" placeholder="Pick School Type" label="name" track-by="name" :preselect-first="true">
and the JS code for this is written like this:
async addSchool() {
this.isbtnLoading = true;
this.isException = false;
await this.axios.post(this.school, this.form).then(response => {
this.addSchoolType(response.data);
})
},
async addSchoolType(id) {
this.isbtnLoading = true;
this.isException = false;
this.schoolTypeform.shoolId = id;
await this.axios.post(this.apiBasedUrl + '/SchoolsSchoolType', this.schoolTypeform).then(response => {
this.isbtnLoading = false;
});
Now my ER structure is given like this:
School:(Table1)
public partial class Schools
{
public Guid ID { get; set; }
public string Name{ get; set; }
// Navigation
public ICollection<SchoolsSchoolType> SchoolsSchoolTypes { get; set; }
}
SchoolType:(Table2)
public class SchoolType
{
public Guid Id { get; set; }
public string Name { get; set; }
//Navigation
public ICollection<SchoolsSchoolType> SchoolsSchoolTypes { get; set; }
}
SchoolsSchoolType (It is Intermediate table): Here the relation between the above is many to many.
public class SchoolsSchoolType
{
public Guid Id { get; set; }
public Guid ShoolId { get; set; }
public Schools Schools { get; set; }
public Guid SchoolTypeId { get; set; }
public SchoolType SchoolType { get; set; }
}
Here is repository method write for single value input, but I want to add here multiple value in the intermediates or junction table.
public async Task<Guid> CreateSchoolsAsync(SchoolsCreateVm schoolsCreateVm)
{
if (_GpsContext != null)
{
var schoolsEntity = new Schools()
{
ID = Guid.NewGuid(),
Name = schoolsCreateVm.Name,
SchoolsSchoolTypes = new List<SchoolsSchoolType>()
};
var schoolType = new SchoolType();
schoolsEntity.SchoolsSchoolTypes = new List<SchoolsSchoolType>
{
new SchoolsSchoolType
{
ShoolId =schoolsEntity.ID,
SchoolTypeId =schoolType.Id
}
};
return schoolsEntity.ID;
}
return Guid.Empty
}
Controller code is written here:
[HttpPost]
public async Task<IActionResult> PostSchool([FromBody]SchoolsCreateVm schoolsCreateVm)
{
var result = await _schoolsRepository.CreateSchoolsAsync(schoolsCreateVm);
if (result != null)
{
return Ok(result);
}
return NotFound();
}
Here is viewmodel used by me:
public class SchoolsCreateVm
{
public string Name { get; set; }
public List<Guid> SchoolTypeId{ get; set; } // List type of for intermediate table
public SchoolsCreateVm()
{
SchoolTypeId = new List<Guid>();
}
How can insert many schooltype for a single school in the intermediates(many to many) relation table through the VUEJS multiple selects.

Answer 1

Finally I am able to find the solution...
public async Task<Guid> CreateSchoolsAsync(SchoolsCreateVm schoolsCreateVm)
{
if (_GpsContext != null)
{
var schoolId = Guid.NewGuid();
var schoolsEntity = new Schools()
{
ID = schoolId, // 1--[1,2,3]
Name = schoolsCreateVm.Name,
};
// Here the code in which we can enter in the multiple table and Intermediate table
var SchoolsSchoolTypeList = new List<SchoolsSchoolType>();
foreach(var item in schoolsCreateVm.SchoolTypeId)
{
SchoolsSchoolTypeList.Add(new SchoolsSchoolType
{
Id = Guid.NewGuid(),
ShoolId = schoolId,
SchoolTypeId = item,
});
}
await _GpsContext.School.AddAsync(schoolsEntity);
_GpsContext.SchoolsSchoolTypes.AddRange(SchoolsSchoolTypeList);//Enter here for intermediate table that is 'SchoolsSchoolTypes'
await _GpsContext.SaveChangesAsync();
return schoolsEntity.ID;
}
return Guid.Empty;
}