SelectQuery class
The Namespace Terrasoft.Nui.ServiceModel.DataContract.
The SelectQuery data contract is used for reading section records. The query data is transferred to DataService via HTTP, with the help of POST by the URL.
- Structure of select query
- Example the select query
// URL format of the POST query to read data from DataService.
http(s)://[Creatio application address]/[Configuration number]/dataservice/[Data fromat]/reply/SelectQuery
// URL example of the POST query to read data from DataService.
http(s)://example.creatio.com/0/dataservice/json/reply/SelectQuery
The SelectQuery data contract has a complex hierarchical structure with a number of nesting levels. In the Creatio server core, it is represented by a SelectQuery class of the Terrasoft.Nui.ServiceModel.DataContract namespace of the Terrasoft.Nui.ServiceModel.dll library of classes. The hierarchical data structure of the SelectQuery data contract can be conveniently viewed in JSON format:
{
"RootSchemaName":"[Object root schema name]",
"OperationType":[Type of record operation],
"Columns":{
"Items":{
"Name":{
"OrderDirection":[Sorting order],
"OrderPosition":[Column position],
"Caption":"[Title]",
"Expression":{
"ExpressionType":[Expression type],
"ColumnPath":"[Path to column]",
"Parameter":[Parameter],
"FunctionType":[Function type],
"MacrosType":[Macro type],
"FunctionArgument":[Function argument],
"DatePartType":[Type of date part],
"AggregationType":[Aggregation type],
"AggregationEvalType":[Aggregation scope],
"SubFilters":[Buit-in filters]
}
}
}
},
"AllColumns":[Indicates that all columns are selected],
"ServerESQCacheParameters":{
"CacheLevel":[Caching level],
"CacheGroup":[Caching group],
"CacheItemName":[Record key in repository]
},
"IsPageable":[Indicates page-by-page],
"IsDistinct":[Indicates uniqueness],
"RowCount":[Number of selected records],
"ConditionalValues":[Conditions for building a pageable query],
"IsHierarchical":[Indicates hierarchical data selection],
"HierarchicalMaxDepth":[Maximum nesting level of the hierarchical query],
"HierarchicalColumnName":[Column name used to create hierarchical query],
"HierarchicalColumnValue":[Initial value of hierarchical column],
"Filters":[Filters]
}
Properties
RootSchemaName string
String that contains root schema name of the added record object.
OperationType QueryOperationType
Type of write operation. Specified as a QueryOperationType enumeration value of the Terrasoft.Nui.ServiceModel.DataContract namespace. The QueryOperationType.Select value is set for SelectQuery.
Available values (QueryOperationType)
Select | 0 |
Insert | 1 |
Update | 2 |
Delete | 3 |
Batch | 4 |
Columns SelectQueryColumns
Contains a collection of the record columns being read. It has the SelectQueryColumns type defined in the Terrasoft.Nui.ServiceModel.DataContract namespace. It must be configured if the AllColumns checkbox is set to false and a set of specific root schema columns, which does not include the Id column, is required.
AllColumns bool
Indicates if all columns are selected. If the value is set to true, all columns of the root schema will be selected by the query.
ServerESQCache Parameters
Parameters of EntitySchemaQuery caching on server. The ServerESQCacheParameters type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
IsPageable bool
Indicates whether the data is selected page-by-page.
IsDistinct bool
Indicates whether duplicates must be eliminated in the resulting data set.
RowCount int
Number of selected strings. By default, the value is -1, i.e. all strings are selected.
ConditionalValues ColumnValues
Conditions of creating a page-by-page query. The ColumnValues type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
IsHierarchical bool
Indicates whether the data is selected hierarchically.
HierarchicalMaxDepth int
Maximum nesting level of a hierarchical query.
hierarchicalColumnName string
Name of the column used for creating a hierarchical query.
hierarchicalColumnValue string
Initial value of hierarchical column from which the hierarchy will be built.
Filters Filters
Collection of query filters. The Filters type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
ColumnValues ColumnValues
Contains collection of column values for the added record. The ColumnValues type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
SelectQueryColumns class
The Namespace Terrasoft.Nui.ServiceModel.DataContract.
The SelectQueryColumns class has a single Items property, defined as a collection of keys and values Dictionary<string, SelectQueryColumn>. The key is the string with the name of the added column. The value is an instance of the SelectQueryColumn class, defined in the Terrasoft.Nui.ServiceModel.DataContract namespace. The properties of the SelectQueryColumn are available in the table.
Properties
OrderDirection OrderDirection
Sorting order. Specified with a value from the [OrderDirection](https://academy.creatio.com/api/netcoreapi/8.0.0/api/index.html) enumeration of the Terrasoft.Common name space defined in the [Terrasoft.Common](https://academy.creatio.com/api/netcoreapi/8.0.0/api/index.html) class library.
OrderPosition int
Sets position number in the collection of the query columns, by which the sorting is done.
Caption string
Column title.
Expression ColumnExpression
Property that defines expression of the type of selected column.
ColumnExpression class
The Namespace Terrasoft.Nui.ServiceModel.DataContract.
The ColumnExpression class defines expression that sets the type of the schema column. The class is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace of the Terrasoft.Nui.ServiceModel library. The properties of an instance of this class are filled in depending on the ExpressionType property, which sets the expression type. The full list of the ColumnExpression class properties is available in table.
Properties
ExpressionType EntitySchemaQuery ExpressionType
Type of expression that determines the value that the added column will contain. Specified with a value from the ntitySchemaQueryExpressionType enumeration of the Terrasoft.Core.Entities namespace defined in the Terrasoft.Core class library. The EntitySchemaQueryExpressionType.Parameter value is set for InsertQuery.
Available values (EntitySchemaQueryExpressionType)
SchemaColumn | 0 | Schema column. |
Function | 1 | Function. |
Parameter | 2 | Parameter. |
SubQuery | 3 | Subquery. |
ArithmeticOperation | 4 | Arithmetic operation. |
ColumnPath string
Path to the column in relation to the root schema. Rules for building paths are available in the Configure the column paths relative to the root schema article.
Parameter Parameter
Determines the value that the added column will contain. The Parameter type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
FunctionType FunctionType
Function type. Specified with a value from the FunctionType enumeration, which is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
Available values (FunctionType)
None | 0 | Not defined. |
Macros | 1 | Macro. |
Aggregation | 2 | Aggregate function. |
DatePart | 3 | Part of date value. |
Length | 4 | Length. |
MacrosType EntitySchemaQuery MacrosType
Macro type. Specified with a value of the EntitySchemaQueryMacrosType enumeration, which is defined in the Terrasoft.Core.Entities namespace.
FunctionArgument BaseExpression
Function argument. Accepts a value if the function is defined with a parameter. The BaseExpression class is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace, is an ancestor for the ColumnExpresion class and has the same set of properties.
DatePartType DatePart
Part of date value Specified with a value from the DatePart enumeration, which is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
Available values (DatePart)
None | 0 | Not defined. |
Day | 1 | Day. |
Week | 2 | Week. |
Month | 3 | Month |
Year | 4 | Year. |
Weekday | 5 | Week day. |
Hour | 6 | Hour. |
HourMinute | 7 | Minute. |
AggregationType AggregationType
Aggregate function type. Specified with a value from the AggregationType enumeration defined in the Terrasoft.Common namespace defined in the Terrasoft.Common class library.
AggregationEvalType AggregationEvalType
Aggregate function scope. Specified with a value from the AggregationEvalType enumeration defined in the Terrasoft.Common namespace defined in the Terrasoft.Common class library.
SubFilters Filters
Collection of subquery filters. The Filters type is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace.
Parameter class
The Namespace Terrasoft.Nui.ServiceModel.DataContract.
The Parameter class is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace. Its properties are available in table.
Properties
DataValueType DataValueType
Type of data for the value that the added column will contain. Specified as a DataValueType enumeration value of the Terrasoft.Nui.ServiceModel.DataContract namespace.
Available values (DataValueType)
Guid | 0 |
Text | 1 |
Integer | 4 |
Float | 5 |
Money | 6 |
DateTime | 7 |
Date | 8 |
Time | 9 |
Lookup | 10 |
Enum | 11 |
Boolean | 12 |
Blob | 13 |
Image | 14 |
ImageLookup | 16 |
Mapping | 18 |
Value object
The object that contains the value of the added column.
ArrayValue string[]
Array of the added column values. Used when serializing arrays and BLOBs.
ShouldSkipConvertion bool
Indicates the need to skip the process of providing the type for the Value property.
ServerESQCacheParameters class
The Namespace Terrasoft.Nui.ServiceModel.DataContract.
The ServerESQCacheParameters class is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace. Its properties are available in table.
Properties
CacheLevel int
Data allocation level in the EntitySchemaQuery cache.
CacheGroup string
Caching group.
CacheItemName string
Repository record key.
The Filters class is defined in the Terrasoft.Nui.ServiceModel.DataContract namespace. For details on the properties of this class and its use, please see the Filters class article.