1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
using System.Security.Permissions;
using System.Collections.Generic;
using System.Diagnostics;
using System.Web.DynamicData.ModelProviders;
using System.Collections;
using System.Web.Routing;
namespace System.Web.DynamicData {
/// <summary>
/// A special column representing 1-many relationships
/// </summary>
public class MetaChildrenColumn : MetaColumn, IMetaChildrenColumn {
public MetaChildrenColumn(MetaTable table, ColumnProvider entityMember)
: base(table, entityMember) {
}
/// <summary>
/// Perform initialization logic for this column
/// </summary>
internal protected override void Initialize() {
base.Initialize();
AssociationProvider a = this.Provider.Association;
ChildTable = Model.GetTable(a.ToTable.Name, Table.DataContextType);
if (a.ToColumn != null) {
ColumnInOtherTable = ChildTable.GetColumn(a.ToColumn.Name);
}
}
/// <summary>
/// Returns whether this entity set column is in a Many To Many relationship
/// </summary>
public bool IsManyToMany {
get {
return Provider.Association != null &&
Provider.Association.Direction == AssociationDirection.ManyToMany;
}
}
/// <summary>
/// The child table (e.g. Products in Categories<-Products)
/// </summary>
public MetaTable ChildTable { get; private set; }
/// <summary>
/// A pointer to the MetaColumn in the other table
/// </summary>
public MetaColumn ColumnInOtherTable { get; private set; }
/// <summary>
/// Override disabling sorting
/// </summary>
internal override string SortExpressionInternal {
get {
// children columns are not sortable
return String.Empty;
}
}
/*protected*/ internal override bool ScaffoldNoCache {
get {
// always display 1-many associations
return true;
}
}
/// <summary>
/// Shortcut for getting the path to the list action for all entities in the child table that have the given row as a parent.
/// </summary>
/// <param name="row"></param>
/// <returns></returns>
public string GetChildrenListPath(object row) {
return GetChildrenPath(PageAction.List, row);
}
public string GetChildrenPath(string action, object row) {
// If there is no row, we can't get a path
if (row == null)
return String.Empty;
return ChildTable.GetActionPath(action, GetRouteValues(row));
}
public string GetChildrenPath(string action, object row, string path) {
// If there is no row, we can't get a path
if (row == null)
return String.Empty;
if (String.IsNullOrEmpty(path)) {
return GetChildrenPath(action, row);
}
// Build a query string param with our primary key
RouteValueDictionary routeValues = GetRouteValues(row);
// Add it to the path
return QueryStringHandler.AddFiltersToPath(path, routeValues);
}
private RouteValueDictionary GetRouteValues(object row) {
var routeValues = new RouteValueDictionary();
IList<object> pkValues = Table.GetPrimaryKeyValues(row);
var fkColumn = ColumnInOtherTable as MetaForeignKeyColumn;
if (fkColumn != null) {
Debug.Assert(fkColumn.ForeignKeyNames.Count == pkValues.Count);
for (int i = 0; i < fkColumn.ForeignKeyNames.Count; i++) {
routeValues.Add(fkColumn.ForeignKeyNames[i], Misc.SanitizeQueryStringValue(pkValues[i]));
}
}
return routeValues;
}
IMetaTable IMetaChildrenColumn.ChildTable {
get { return ChildTable; }
}
IMetaColumn IMetaChildrenColumn.ColumnInOtherTable {
get { return ColumnInOtherTable; }
}
}
}
|
