protected static async Task <ModifySolverResult> UpdateConflictResolver(IDocumentStore store, string resovlerDbId = null, Dictionary <string, ScriptResolver> collectionByScript = null, bool resolveToLatest = false)
{
var op = new ModifyConflictSolverOperation(store.Database,
resovlerDbId, collectionByScript, resolveToLatest);
return(await store.Admin.Server.SendAsync(op));
}
public ConflictSolver()
{
using (var store = new DocumentStore())
{
{
#region solver_3
// resolve conflict to latest version
ModifyConflictSolverOperation operation =
new ModifyConflictSolverOperation("Northwind", null, resolveToLatest: true);
store.Maintenance.Server.Send(operation);
#endregion
}
{
#region solver_4
// resolve conflict by finding max value
string script = @"
var maxRecord = 0;
for (var i = 0; i < docs.length; i++) {
maxRecord = Math.max(docs[i].maxRecord, maxRecord);
}
docs[0].MaxRecord = maxRecord;
return docs[0];";
ModifyConflictSolverOperation operation =
new ModifyConflictSolverOperation("Northwind", new Dictionary <string, ScriptResolver>
{
{ "Orders", new ScriptResolver {
Script = script
} }
}, resolveToLatest: false);
store.Maintenance.Server.Send(operation);
#endregion
}
}
}
public async Task CodeSamples()
{
using (var store = new DocumentStore
{
})
{
#region PUT_Sample
using (var session = store.OpenSession())
{
session.Store(new User {
Name = "John Doe"
}, "users/123"); // users/123 is a conflicted document
session.SaveChanges(); //when this request is finished, the conflict for users/132 is resolved.
}
#endregion
#region DELETE_Sample
using (var session = store.OpenSession())
{
session.Delete("users/123"); // users/123 is a conflicted document
session.SaveChanges(); //when this request is finished, the conflict for users/132 is resolved.
}
#endregion
#region Modify_conflict_resolution_sample
using (var documentStore = new DocumentStore
{
Urls = new [] { "http://<url of a database>" },
Database = "<database name>"
})
{
var resolveByCollection = new Dictionary <string, ScriptResolver>
{
{
"ShoppingCarts", new ScriptResolver //specify conflict resolution for collection
{
// conflict resolution script is written in javascript
Script = @"
var final = docs[0];
for(var i = 1; i < docs.length; i++)
{
var currentCart = docs[i];
for(var j = 0; j < currentCart.Items.length; j++)
{
var item = currentCart.Items[j];
var match = final.Items
.find( i => i.ProductId == item.ProductId);
if(!match)
{
// not in cart, add
final.Items.push(item);
}
else
{
match.Quantity = Math.max(
item.Quantity ,
match.Quantity);
}
}
}
return final; // the conflict will be resolved to this variant
"
}
}
};
var op = new ModifyConflictSolverOperation(
store.Database,
resolveByCollection, //we specify conflict resolution scripts by document collection
resolveToLatest: true); // if true, RavenDB will resolve conflict to the latest
// if there is no resolver defined for a given collection or
// the script returns null
await store.Maintenance.Server.SendAsync(op);
}
#endregion
}
}
