Entity whose value does not change

I have been trying to find this answer but I could not find the proper explanation Some say that they are the same and others say otherwise I know for a compound object, The object will consist of multiple values But for simple objects like int or string can we say that they are identical and values are objects themselves? Thank you But for simple objects like int or string can we say that they are identical and values are objects themselves? Not exactly but there is the concept of ' In Python when you use the == operator you are testing the identity of the object based on its value. When you use the is operator, you are testing object identity. So conceptually, value objects are used as if they are values but technically they are still objects and it's good to keep that distinction in mind. It's also possible that the implementation of value objects might be to reuse a single instance (when possible) of a value object. For example, in Java, string literals will be 'interned' to avoid creating multiple objects with the same string value. Similar optimizations occur with Integer instances. You should not depend on this in general, though and doing so may result in bugs. Value is a property of each Object. Values are the results of operations, e.g. 1 + 1 results in an object with the value 2. Objects are Python’s abstraction for data. All data in a Python program is represented by objects or by relations between objects. Every object has an identity, a type and a value. The ...

• Home • Popular Menu Toggle • Angular • JavaScript Tutorial • Typescript • ASP.NET Core • Entity Framework 6 • Entity Framework Core • SQL Server • Other Categories Menu Toggle • Crystal Reports • C# • ASP.NET • Nativescript • Android Studio • Visual Studio • Programming Tutorials • About Us Menu Toggle • Privacy Policy • Contact Us The ChangeTracker in EF Core tracks changes made to every entity by assigning them the Entity States. It uses the EntityEntryclass to store the tracking information of a given entity. The Entity States represents the state of an entity. The Entity State can be Added, Deleted, Modified, Unchanged or Detached. For example, when we add a new entity to DbContext using the Add / AddRange method, the DbContext sets the state of the entity as Added. When we query and load the entity the state is set to Unchanged. If we make any changes to the entity then its state becomes Modified The SaveChanges uses these states to determine to generate the SQL query ( Insert, Update or Delete ) Table of Contents • • • • • • • • • • • ChangeTracker The ChangeTrackerclass is responsible for keeping track of entities loaded into the Context. It does so by creating an EntityEntry class instance for every entity. The ChnageTracker maintains the Entity State, the Original Values, Current Values, etc of each entity in the EntityEntry class. EntityEntry Each entity tracked by the context gets an instance of the EntityEntryclass. It stores the Change tracking information o...

Hey Everyone! I have a Govee Bluetooth thermometer that sometimes loses connection but Home Assistant does not register the thermometer as “unavailable”. Reloading the Bluetooth integration will fix the connection. I would like to create an automation to reload Bluetooth if there is no temperature change over five minutes. How would I set that up? Thanks for your help!! The following automation notifies you when the sensor’s state value hasn’t changed in the past 30 minutes and then reloads the integration associated with the sensor entity (change sensor.your_temperature_sensor to your temperature sensor). alias: example abc123 trigger: - platform: template value_template: " Value unchanged for the past 30 minutes." - service: homeassistant.reload_config_entry target: entity_id: sensor.your_temperature_sensor Currently there’s no explicit “integration reload” service call. However homeassistant.reload_config_entry should do the same thing provided the entity’s integration is configured via the config flow process and not via YAML. I believe the Bluetooth integration is handled by config flow. That I need to do an automation with a script… because a problem since 2022.8 the Switchbot bot doesn’t work without reload the bluetooth integration in RPI4, the problem is that bluetooth integration doesn’t have any device and reloading the Switchbot device doesn’t work at all…so have to reload manually the bluetooth integration and work… or have to do with a shell command to reload...

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I have a working Update method , which is simply changing a property value and calls SaveChanges() on db context: public void Update(int id, string name) ..when debugging, i can see that the state of my entity is Unchanged. If you haven't disabled the Single extension method you will see that is a proxy class, not your real class. So, first check if you're meeting all those requirements that EF needs to track your changes automatically, you'll be fine with that code. For either of these proxies to be created: • A custom data class must be declared with public access. • A custom data class must not be sealed • A custom data class must not be abstract . • A custom data class must have a public or protected constructor that does not have parameters. Use a protected constructor without parameters if you want the CreateObject method to be used to create a proxy for the POCO entity. Calling the CreateObject method does not guarantee the creation of the proxy: the POCO class must follow the other requirements that are described in this topic. • The class cannot implement the IEntityWithChangeTracker or IEntityWithRelationships interfaces because the proxy classes implement these interfaces. • The ProxyCreationEnabled option must be set to true. For change tracking proxies: • Each property that is mapped to a property of an entity type in the data model must have non-sealed, public, and virtual get and set accessors. • A navigation property that represents the "many" end of a rel...

• Home • Popular Menu Toggle • Angular • JavaScript Tutorial • Typescript • ASP.NET Core • Entity Framework 6 • Entity Framework Core • SQL Server • Other Categories Menu Toggle • Crystal Reports • C# • ASP.NET • Nativescript • Android Studio • Visual Studio • Programming Tutorials • About Us Menu Toggle • Privacy Policy • Contact Us The ChangeTracker in EF Core tracks changes made to every entity by assigning them the Entity States. It uses the EntityEntryclass to store the tracking information of a given entity. The Entity States represents the state of an entity. The Entity State can be Added, Deleted, Modified, Unchanged or Detached. For example, when we add a new entity to DbContext using the Add / AddRange method, the DbContext sets the state of the entity as Added. When we query and load the entity the state is set to Unchanged. If we make any changes to the entity then its state becomes Modified The SaveChanges uses these states to determine to generate the SQL query ( Insert, Update or Delete ) Table of Contents • • • • • • • • • • • ChangeTracker The ChangeTrackerclass is responsible for keeping track of entities loaded into the Context. It does so by creating an EntityEntry class instance for every entity. The ChnageTracker maintains the Entity State, the Original Values, Current Values, etc of each entity in the EntityEntry class. EntityEntry Each entity tracked by the context gets an instance of the EntityEntryclass. It stores the Change tracking information o...

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I have a model that has some columns defined with default values like table.Column(nullable: false, defaultValueSql: "1") When I save a new entity in the database using context.SaveChanges(), I noticed that the columns with default values are not included in the insert into query that Entity Framework generates, so the values generated in the database are the default ones instead of the ones I'm passing in the model. Do I have to set up some property in the context to be able to set these properties through code? I'm using EF Core, but I don't know if this is a general behavior of all EF versions. UPDATE: the code is pretty simple. This is pseudo code of what I have. The Model has some properties defined with constraints such as the one I describe above table.Column(nullable: false, defaultValueSql: "1") I'll use column MyBooleanProperty as an example. I have in a service: var newModel = new GEAddress(); newModel = someEntity.MyBooleanProperty; //it is false,but ends up as 1 in the database I'm using Unit Of Work and Repositories so I have _unitOfWork.MyModelRepository.Add(newModel); _unitOfWork.SaveChanges(); In the output window of VS, I see how it send all properties in an INSERT INTO query and then it does a SELECT on the properties with default values. The result is the newModel in the database with all the values I sent, except the columns with default values. I cannot change the configuration for those tables since it's being used by another system that needs those ...

Hey Everyone! I have a Govee Bluetooth thermometer that sometimes loses connection but Home Assistant does not register the thermometer as “unavailable”. Reloading the Bluetooth integration will fix the connection. I would like to create an automation to reload Bluetooth if there is no temperature change over five minutes. How would I set that up? Thanks for your help!! The following automation notifies you when the sensor’s state value hasn’t changed in the past 30 minutes and then reloads the integration associated with the sensor entity (change sensor.your_temperature_sensor to your temperature sensor). alias: example abc123 trigger: - platform: template value_template: " Value unchanged for the past 30 minutes." - service: homeassistant.reload_config_entry target: entity_id: sensor.your_temperature_sensor Currently there’s no explicit “integration reload” service call. However homeassistant.reload_config_entry should do the same thing provided the entity’s integration is configured via the config flow process and not via YAML. I believe the Bluetooth integration is handled by config flow. That I need to do an automation with a script… because a problem since 2022.8 the Switchbot bot doesn’t work without reload the bluetooth integration in RPI4, the problem is that bluetooth integration doesn’t have any device and reloading the Switchbot device doesn’t work at all…so have to reload manually the bluetooth integration and work… or have to do with a shell command to reload...

I have been trying to find this answer but I could not find the proper explanation Some say that they are the same and others say otherwise I know for a compound object, The object will consist of multiple values But for simple objects like int or string can we say that they are identical and values are objects themselves? Thank you But for simple objects like int or string can we say that they are identical and values are objects themselves? Not exactly but there is the concept of ' In Python when you use the == operator you are testing the identity of the object based on its value. When you use the is operator, you are testing object identity. So conceptually, value objects are used as if they are values but technically they are still objects and it's good to keep that distinction in mind. It's also possible that the implementation of value objects might be to reuse a single instance (when possible) of a value object. For example, in Java, string literals will be 'interned' to avoid creating multiple objects with the same string value. Similar optimizations occur with Integer instances. You should not depend on this in general, though and doing so may result in bugs. Value is a property of each Object. Values are the results of operations, e.g. 1 + 1 results in an object with the value 2. Objects are Python’s abstraction for data. All data in a Python program is represented by objects or by relations between objects. Every object has an identity, a type and a value. The ...