composite-key

来源： https://stackoverflow.com/questions/26871665/odata-v3-web-api-navigation-with-composite-key

来源： https://stackoverflow.com/questions/58237561/save-composite-key-data-to-elastic-search-document

问题 I've come across a problem at work where I can't find information on the usual standard or practice for performing CRUD operations in a RESTful web service against a resource whose primary key is a composite of other resource ids. We are using MVC WebApi to create the controllers. For example, we have three tables: Product : PK=ProductId Part : PK=PartId ProductPartAssoc : PK=(ProductId, PartId) A product can have many parts and a part can be a component of many products. The association

问题 I have created a cluster create cluster abc_clus (abc_key int) ; and then created an index based on that cluster create index abc_clus_idx on cluster abc_clus; I tried adding this cluster on these 4 tables for a complex join create table number1 ( dateofbirth date, Time timestamp(0), IDnumber int not null, class varchar(7) not null, primary key (dateofbirth, Time, class)) cluster abc_clus(class); and create table number2( tutornumber int not null, forename varchar2(20) not null, constraint

问题 I need to map based on two keys(comp and part). @foreach (var item in Model) { <tr> <td> @Html.DisplayFor(modelItem => item.comp) </td> <td> @Html.DisplayFor(modelItem => item.part) </td> ........................... <td> @Html.ActionLink("Edit", "Edit", new { id=item.comp }) | @Html.ActionLink("Details", "Details", new { id = item.comp }) | @Html.ActionLink("Delete", "Delete", new { id = item.comp }) </td> </tr> } how to use composite key in Index page and also in controller. public

问题 I need to map based on two keys(comp and part). @foreach (var item in Model) { <tr> <td> @Html.DisplayFor(modelItem => item.comp) </td> <td> @Html.DisplayFor(modelItem => item.part) </td> ........................... <td> @Html.ActionLink("Edit", "Edit", new { id=item.comp }) | @Html.ActionLink("Details", "Details", new { id = item.comp }) | @Html.ActionLink("Delete", "Delete", new { id = item.comp }) </td> </tr> } how to use composite key in Index page and also in controller. public

问题 I have this entity class having more than one primary key ( @Id ) which resulted me to use @RooJpaActiveRecord(identifierType = '<IdentifierClass.class>') and @RooIdentifier(dbManaged=true) . Yet I am having a problem on accessing Identifier.class from the entity class itself. My questions is how can I access Identifier in the entity class without, at most, removing the @RooJpaActiveRecord(identifierType = '<Identifier.class>') code. 回答1: Roo will generate a property id on your entity. This

问题 I am trying to map a composite key for an entity. public class Customer { public int CustomerId { get; set; } public virtual List<CustomerImage> CustomerImages { get; set; } } And its Map: public class CustomerMap : EntityTypeConfiguration<Customer> { public CustomerMap() { HasKey(t => t.CustomerId); ToTable(DbConstants.k_CustomersImageTable); } } An Image: public class Image { public int ImageId { get; set; } } And its map: public class ImageMap : EntityTypeConfiguration<Image> { public

问题 My Parent class has two child classes: Child and ParentHobby . The Child class has a singular PK and the @OneToMany mapping on it works. The problem is that I don't know how to map it on the ParentHobby class, which has a composite PK. Parent: //this works @OneToMany(cascade = CascadeType.ALL, mappedBy = "parent", fetch = FetchType.EAGER) private List<Child> childList; //this DOES NOT work @OneToMany(cascade = CascadeType.ALL, mappedBy = "parent", fetch = FetchType.EAGER) private List

问题 I have a model with one_to_many relatioship: class Work < ActiveRecord::Base has_many :work_right_holders accepts_nested_attributes_for :work_right_holders, allow_destroy: true end class WorkRightHolder < ActiveRecord::Base self.primary_keys = :work_id, :right_holder_id, :role belongs_to :work belongs_to :right_holder end When I try to update a work with nested attributes, it create new instances of object in the relationship, instead of updating the existing based on their primary key: work