Hi I have an existing database with a table with 30 fields, I want to split the table into many models so I could retrieve/save fields that I need and not every time retrieve/save the whole object from the db. using c#.
I think I should be using Code-First. Could someone provide an example or a tutorial link?
thanks,
You don't need to split table to be able to load a subset of field or persist subset of fields. Both operations are available with the whole table mapped to single entity as well.
For selection you simply have to use projection:
var data = from x in context.HugeEntities
select new { x.Id, x.Name };
You can use either anonymous type in projection or any non-mapped class.
For updates you can simply use:
var data = new HugeEntity { Id = existingId, Name = newName };
context.HugeEntities.Attach(data);
var dataEntry = context.Entry(data);
dataEntry.Property(d => d.Name).IsModified = true; // Only this property will be updated
context.SaveChanges();
Or:
var data = new HugeEntity { Id = existingId };
context.HugeEntities.Attach(data);
data.Name = newName;
context.SaveChanges(); // Now EF detected change of Name property and updated it
Mapping multiple entities to single table must follows very strict rules and it is possible only with table splitting were all entities must be related with one-to-one relation (and there are some problems with more than two entities per split table in code first) or with table-per-hierarchy inheritance. I don't think that you want to use any of them for this case.
Related
I have CoreData with simple relationships as you can see below. One entity Word with 4 attributes and a Chapter entity with a one to many relationship (each word figures in only one chapter and chapters contains several words). When I try to import a file with a list of words and associated chapter, the chapters which are not yet in the database are created (which is what I want) but the chapters that already exists are created a 2nd time (new same entry in coredata). Is there an option I can activate in xcdatamodel to check and avoid duplicate entries on the relation entity?
Code details ->
fileprivate func saveAllWords(_ items: [(name: String, definition: String, example: String, chapter: String)]?) {
for item in items! {
let newWord = Word(context: self.context)
newWord.name = item.name.trimmingCharacters(in: .whitespaces)
newWord.definition = item.definition.trimmingCharacters(in: .whitespaces)
newWord.example = item.example.trimmingCharacters(in: .whitespaces)
newWord.option = 10 // option tag indicating that it's a new entry from external fileI generate a classic word
//
let myNewChapter = Chapter(context: self.context)
myNewChapter.name = item.chapter
newWord.chapter = myNewChapter
}
……
// Save the data in Core Data
do {
try self.context.save()
}
catch {
}
Any recommendation how to implement this uniqueness constraint to solve my duplicate issue?
You have to create a constraint for the unique attribute. It looks like you want the name of the Chapter to be unique
In your xcdatamodeld select your attribute, then right constraint and add they attribute.
Last but not least you will have to add merge policy for your Context, mostly likely in your AppDelegate. There are different merge policy. You should check them out which fits your needs most
context.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
Here is I have two entity custom fields with list/record type,
custom_dev_j15 entity field has a custom source list (eg: one, two, three, four, etc)
custom_qa_v93 entity field has a standard source list as an object (eg: customer )
I've two vendor entity custom fields as stated in screenshots of question,
custentity473 --> customer is selected as list source
custentity474 --> custom_dev_j15_m_list as selected as list source ( which is custom list)
Here is snippet that i used to get the options of these fields,
// Snippet
var fieldDetails = {};
var record = nlapiCreateRecord("Vendor");
var field = record.getField("custentity473");
var selectoptions = field.getSelectOptions();
for ( var i in selectOptions) {
var Option = {
id : selectOptions[i].getId(),
label : selectOptions[i].getText()
}
Options.push(Option);
}
fieldDetail["options"] = Options;
But my need is to get source list information like name of the list source (customer or custom_dev_j15_m_list) via suitescript
any idea on how to get this information?
Thanks in advance
I'm not sure I understand this question for what you're trying to do.
In NetSuite almost always, you accommodate to the source list types because you know that's the type, and if you need something else (e.g. a selection which is a combination/or custom selection you'll use a scripted field)
Perhaps you can expand on your use case, and then we can help you further?
I am creating a custom module in Orchard , I would like to create a query programmatically.
string queryName= "Product";
var item = _orchardServices.ContentManager.New("Query");
item.As<TitlePart>().Title =queryName;
_orchardServices.ContentManager.Create(item, VersionOptions.Draft);
if (!item.Has<IPublishingControlAspect>() && !item.TypeDefinition.Settings.GetModel<ContentTypeSettings>().Draftable)
_orchardServices.ContentManager.Publish(item);
var queryPart = item.As<QueryPart>();
queryPart.ContentItem.ContentType = queryName;
string desc =" filter for the query";
string contentType = "CommonPart.ChannelID.";
var filterGroupRecord = new FilterGroupRecord();
var filterRecord = new FilterRecord()
{
Category = "CommonPartContentFields",
Type = contentType,
Position = 0,
};
filterRecord.State = "<Form><Description>" + desc + "</Description><Operator>Equals</Operator><Value>ChannelId</Value></Form>";
filterGroupRecord.Filters.Add(filterRecord);
queryPart.FilterGroups.Insert(0, filterGroupRecord);
the problem is that：I want set a filters of the query,not a filters group.
could you tell me how to improve my code?
Database structure and class declarations make it impossible. Why do you need it?
Update:
I means that you must use FilterGroupRecord at least one.
But when Query published that Filter Group will be created automatically if query have not yet Filter Group (see at QueryPartHandler). You should add your filters to this group. And not needed to create new group.
var existingFilterGroup = queryPart.FilterGroups[0];
existingFilterGroup.Filters.Add(filterRecord);
Update 2:
To avoid problems with draftable query (and several other potential problems Orchard CMS: Adding default data to fields and then querying them) it is better to move the calling Publish method to the end of your code and other part of your code should be left unchanged. And in your case would be better if you will always publish your query without checking IPublishingControlAspect and Draftable.
I have a requirement to sync some entities (account, lead, contact etc) to a database table outside of the crm database but on the same server. I am looking for a supported way for doing this. Here's what I have tried, that don't work:
I first created table in the outside database that matches the schema from dbo.account (view). Then I wrote post create, post update, post assign and post delete plugins to create, update or delete the record in the outside table (using ADO.Net). I have written the plugin in the most generic way so that it can be registered for any entity with minimum changes to the plugin (by not hardcoding the field names). Doing it this way, the problem I am running into is with the fields that are foreign key to other tables. Eg. in dbo.account, there are fields like PrimaryContactId and PrimaryContactIdName, PreferredSystemUserId and PreferredSystemUserIdName, ParentAccountId and ParentAccountIdName etc. In the input parameters for the plugin, the xxxxId fields are available when they are updated, but not the 'xxxxIdName' fields. Because of which I am not able to 'sync' the table as is.
Is there a solution to make my plugin solution work?
Is there a better supported way for having a sync table?
Thanks in advance,
PS: 1. The data sync has to be in real time
PS: 2. Here is my function to get the query that does the update
private static string PrepareUpdateQuery(ITracingService tracingService, IEnumerable<KeyValuePair<string, object>> attributeCollection, string entityName, string entityIdName)
{
var query = "Update MainDb.MSCRM." + entityName + " set ";
foreach (KeyValuePair<string, object> keyValuePair in attributeCollection)
{
tracingService.Trace("Key: {0}", keyValuePair.Key);
if (keyValuePair.Key != entityIdName && keyValuePair.Key != "modifiedonbehalfby")
{
query = query + keyValuePair.Key + " = ";
if (keyValuePair.Value == null)
query = query + "null, ";
else
{
var typeOfValue = keyValuePair.Value.GetType().Name;
tracingService.Trace("typeOfValue: {0}", typeOfValue);
switch (typeOfValue)
{
case "EntityReference":
query = query + "'" + ((EntityReference)keyValuePair.Value).Id + "', ";
break;
case "OptionSetValue":
query = query + ((OptionSetValue)keyValuePair.Value).Value + ", ";
break;
case "BooleanManagedProperty":
query = query + (((BooleanManagedProperty)keyValuePair.Value).Value ? "1" : "0") + ", ";
break;
default:
query = query + "'" + keyValuePair.Value + "', ";
break;
}
}
}
}
return query;
}
If all you're after is the name of the entity that is an attribute on your currently executing plugin, the EntityReference object has a Name property that should contain that name. If it doesn't you you can query CRM with the id and logical name to get any value that you're looking for on the referenced entity.
Edit 1
If you're just moving the data, why even bother setting the referenced name? I'd removed those names from your database table, and just create a view that looks up the corresponding entity's name. It's what CRM is doing. It also makes your other database more normalized. IE. If you update the name of an entity that is referenced by another entity, you will have to search for and update all of those names...
the xxxIdName fields are just a helper for the views really, you can easily figure out what they
should contain.
For example, say you have an account 'some company' with a primary contact called 'bob bobson'.
when processing the account entity the primarycontactId will be a guid and the primarycontactIdName will be 'bob bobson', the accountIdName will be 'some company'.
easiest way to do this in your plugin is to look up the related entity and get the value from there - 90% of the time it's just the name field.
you also need to consider however if you are doing the right thing in using the CRM schema, perhaps it would be better to copy only the fields you need and use your own schema for the sync table.
UPDATE: just saw your code, you are overwritting the value contained in query and not setting it back to the base query, so you will get odd results/errors on the second pass through the foreach
If you're dead set on putting the related entity name in the primary entity table you can always grab it like this:
var entityEntityRef = (EntityReference)keyValuePair.Value;
var relatedEntity = service.Retrieve(entityRef.LogicalName, entityRef.Id, new ColumnSet(true));
Now relatedEntity as all the attributes available. You'll mostly be looking for the Name field, but some entities are different, like contact which uses the full name field I believe.
You can, in fact, register a single plugin for all entities (checking, of course, that the one that's firing the message is in the list of treated ones).
IEnumerable<String> supportees = new String[]{ "account", "contact" };
if(!supportees.Any(element
=> element == targetLogicalName))
return;
As for the linked entities, you have three choices.
Just skip them. Not full data sync but easies to implement.
Store the guids only. Data sync is instance-wide - limited but moderately easy.
Get all the linked data. Full information but a recursive PIA to develop.
I have data in a database, and my code is accessing it using LINQ to Entities.
I am writing some software where I need to be able to create a dynamic script. Clients may write the scripts, but it is more likely that they will just modify them. The script will specify stuff like this,
Dataset data = GetDataset("table_name", "field = '1'");
if (data.Read())
{
string field = data["field"];
while (cway.Read())
{
// do some other stuff
}
}
So that script above is going to read data from the database table called 'table_name' in the database into a list of some kind based on the filter I have specified 'field='1''. It is going to be reading particular fields and performing normal comparisons and calculations.
The most important thing is that this has to be dynamic. I can specify any table in our database, any filter and I then must be able to access any field.
I am using a script engine that means the script I am writing has to be written in C#. Datasets are outdated and I would rather keep away from them.
Just to re-iterate I am not really wanting to keep with the above format, and I can define any method I want to behind the scenes for my C# script to call. The above could end up like this for instance,
var data = GetData("table_name", "field = '1'");
while (data.ReadNext())
{
var value = data.DynamicField;
}
Can I use reflection for instance, but perhaps that would be too slow? Any ideas?
If you want to read dynamically a DataReader context, it's a pretty easy step:
ArrayList al = new ArrayList();
SqlDataReader dataReader = myCommand.ExecuteReader();
if (dataReader.HasRows)
{
while (dataReader.Read())
{
string[] fields = new string[datareader.FieldCount];
for (int i =0; i < datareader.FieldCount; ++i)
{
fields[i] = dataReader[i].ToString() ;
}
al.Add(fields);
}
}
This will return an array list composed by a dynamic object based on the number of field the reader has.