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firestore_database_values.md

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Value

Description

A message that can hold any of the supported value types.

This class is in the Values namespace.

class Value

Constructors

  1. 🔹 Value()

The default constructor.

Value()

Params:

  • name - The resource name of the document.

  1. 🔹 Value(T value)

The constructor with the object value.

See the below supported objects classes.

Value(T value)

Params:

  • value - The object value.

NullValue

Description

A null value.

This class is in the Values namespace.

class NullValue

Constructors

  1. 🔹 NullValue()

The default constructor.

NullValue()

StringValue

Description

A string value.

This class is in the Values namespace.

class StringValue

Constructors

  1. 🔹 StringValue(const String &value)

The constructor with string value.

StringValue(const String &value)

Params:

  • value - The string value.

BooleanValue

Description

A boolean value.

This class is in the Values namespace.

class BooleanValue

Constructors

  1. 🔹 BooleanValue(bool value)

The constructor with boolean value.

BooleanValue(bool value)

Params:

  • value - The boolean value.

IntegerValue

Description

A 64-bit signed integer value.

This class is in the Values namespace.

class IntegerValue

Constructors

  1. 🔹 IntegerValue(int value)

The constructor with a 64-bit signed integer value.

IntegerValue(int64_t value)

Params:

  • value - The 64-bit signed integer value.

DoubleValue

Description

A double value.

This class is in the Values namespace.

class DoubleValue

Constructors

  1. 🔹 DoubleValue(double value)

The constructor with double value.

This constructor is obsoleted.

DoubleValue(double value)

Params:

  • value - The double value.

  1. 🔹 DoubleValue(const number_t &value)

The constructor with number_t represents the double value.

DoubleValue(const number_t &value)

Params:

  • value - The number_t represents the double value.

TimestampValue

Description

A timestampValue value.

This class is in the Values namespace.

class TimestampValue

Constructors

  1. 🔹 TimestampValue(const String &value)

The constructor with timestamp value string.

Precise only to microseconds. When stored, any additional precision is rounded down.

TimestampValue(const String &value)

Params:

  • value - The timestamp value string.

BytesValue

Description

A bytes value.

This class is in the Values namespace.

class BytesValue

Constructors

  1. 🔹 BytesValue(const String &value)

The constructor with timestamp (base64-encoded) value string.

Must not exceed 1 MiB - 89 bytes. Only the first 1,500 bytes are considered by queries.

BytesValue(const String &value)

Params:

  • value - The bytes (base64-encoded) value string.

ReferenceValue

Description

A reference to a document.

This class is in the Values namespace.

class ReferenceValue

Constructors

  1. 🔹 ReferenceValue(const String &value)

The constructor with resource name string.

ReferenceValue(const String &value)

Params:

  • value - The resource name of document.

GeoPointValue

Description

A geo point representing a point on the surface of Earth.

This class is in the Values namespace.

class GeoPointValue

Constructors

  1. 🔹 GeoPointValue(double lat, double lng)

The constructor with latitude and longitude.

This constructor is obsoleted.

GeoPointValue(double lat, double lng)

Params:

  • lat - The latitude.

  • lng - The longitude.

  1. 🔹 GeoPointValue(const number_t &lat, const number_t &lng)

The constructor with latitude and longitude.

This constructor is obsoleted.

GeoPointValue(const number_t &lat, const number_t &lng)

Params:

  • lat - The number_t represents the latitude value.

  • lng - The number_t represents the latitude value.

ArrayValue

Description

An array value.

This class is in the Values namespace.

class ArrayValue

Constructors

  1. 🔹 ArrayValue(T value)

The constructor with object.

Cannot directly contain another array value, though can contain an map which contains another array.

ArrayValue(T value)

Params:

  • value - The object except for array value.

MapValue

Description

A map value.

This class is in the Values namespace.

class MapValue

Constructors

  1. 🔹 MapValue(const String &key, T value)

The constructor with key and object value.

MapValue(const String &key, T value)

Params:

  • key - The key.

  • value - The object value.

Functions

  1. 🔹 MapValue &add(const String &key, T value)

Add key and value pair to a map.

MapValue &add(const String &key, T value)

Params:

  • key - The key.

  • value - The object value.