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Session: Updating Entities

Update an entity by retrieving it, editing its properties, and applying your changes using SaveChanges().


Update

  • Retrieve the entity you wish to update, using a load method or a query.
  • Edit the properties you wish to change.
  • Call SaveChanges() to apply the update.

Example I

In this example we load a company profile and change its type property to private.

using (var session = store.OpenSession())
{
    // Load a document
    Company company = session.Load<Company>("companies/KitchenAppliances");

    // Update the company's type
    company.Type = Company.CompanyType.Private;

    // Apply changes
    session.SaveChanges();
}
using (var asyncSession = store.OpenAsyncSession())
{
    // Load a document
    Company company = await asyncSession.LoadAsync<Company>("companies/KitchenAppliances");

    // Update the company's type
    company.Type = Company.CompanyType.Private;

    // Apply changes
    await asyncSession.SaveChangesAsync();
}

Example II

Here we run a query to find companies whose type is public, and change the type of matching companies to private.

using (var session = store.OpenSession())
{
    // Query: find public companies
    IRavenQueryable<Company> query = session.Query<Company>()
        .Where(c => c.Type == Company.CompanyType.Public);

    var result = query.ToList();

    // Change company type from public to private
    for (var l = 0; l < result.Count; l++)
    {
        result[l].Type = Company.CompanyType.Private;
    }

    // Apply changes
    session.SaveChanges();
}
using (var asyncSession = store.OpenAsyncSession())
{
    // Query: find public companies
    IRavenQueryable<Company> query = asyncSession.Query<Company>()
        .Where(c => c.Type == Company.CompanyType.Public);

    var result = await query.ToListAsync();

    // Change company type from public to private
    for (var l = 0; l < result.Count; l++)
    {
        result[l].Type = Company.CompanyType.Private;
    }

    // Apply changes
    await asyncSession.SaveChangesAsync();
}