FQL cheat sheet

This page provides a quick reference of FQL properties and methods, grouped by functionality.

Access provider

`AccessProvider.all()`	Get all access providers.
`AccessProvider.byName()`	Get an access provider by name.
`AccessProvider.create()`	Create an access provider.
`AccessProvider.firstWhere()`	Get the first access provider that matches a predicate.
`AccessProvider.toString()`	Get `AccessProvider` as a String.
`AccessProvider.where()`	Get a Set of access providers that match a predicate.
`accessProvider.delete()`	Delete an access provider.
`accessProvider.exists()`	Test if an access provider exists.
`accessProvider.replace()`	Replace an access provider.
`accessProvider.update()`	Update an access provider.

Array

`Array.sequence()`	Create an ordered Array of Integers, given start and end values.
`array.length`	Get the number of elements in an Array.
`array.aggregate()`	Aggregate all elements in an Array.
`array.any()`	Test if any Array element matches a predicate.
`array.append()`	Append an element to an Array.
`array.at()`	Get the Array element at a provided index.
`array.concat()`	Concatenate two Arrays.
`array.distinct()`	Get unique elements in an Array.
`array.drop()`	Drop the first N elements of an Array.
`array.entries()`	Add the index as a key to each element of an Array.
`array.every()`	Test if every Array element matches a predicate.
`array.filter()`	Create an Array of elements filtered by a predicate.
`array.first()`	Get the first element of an Array.
`array.firstWhere()`	Get the first Array element that matches a predicate.
`array.flatMap()`	Apply a function to each Array element and flatten the resulting Array by one level.
`array.flatten()`	Flatten Array elements by one level.
`array.fold()`	Reduce the Array to a single, accumulated value by applying a function to each element. Iterates through elements from left to right. Uses a provided seed as the initial value.
`array.foldRight()`	Reduce the Array to a single, accumulated value by applying a function to each element. Iterates through elements from right to left. Uses a provided seed as the initial value.
`array.forEach()`	Run a function on each Array element. Can perform writes.
`array.includes()`	Test if the Array includes a provided element.
`array.indexOf()`	Get the index of the first Array element that matches a provided value.
`array.indexWhere()`	Get the index of the first Array element that matches a predicate.
`array.isEmpty()`	Test if an Array is empty.
`array.last()`	Get the last element of an Array.
`array.lastIndexOf()`	Get the index of the last Array element that matches a provided value.
`array.lastIndexWhere()`	Get the index of the last Array element that matches a predicate.
`array.lastWhere()`	Get the last Array element that matches a predicate.
`array.map()`	Apply a function to each Array element. Can’t perform writes.
`array.nonEmpty()`	Test if an Array is not empty.
`array.order()`	Sort an Array's elements.
`array.prepend()`	Prepend an element to an Array.
`array.reduce()`	Reduce an Array to a single, accumulated value by applying a function to each element. Iterates through elements from left to right. Uses the first element as the initial value.
`array.reduceRight()`	Reduce an Array to a single, accumulated value by applying a function to each element. Iterates through elements from right to left. Uses the first element as the initial value.
`array.reverse()`	Reverse the order of an Array's elements.
`array.slice()`	Copy Array elements to another Array, given element indexes.
`array.take()`	Get the first N elements of an Array.
`array.toSet()`	Convert an Array to a Set.
`array.toString()`	Convert an Array to a String.
`array.where()`	Get the Array elements that match a predicate.

Collection

`collection.definition`	Get or update a collection’s definition, represented as a `Collection` document.
`Collection()`	Get a Collection by name.
`Collection.all()`	Get a Set of all Collections.
`Collection.byName()`	Get a Collection by name.
`Collection.create()`	Create a Collection.
`Collection.firstWhere()`	Get the first Collection that matches a predicate.
`Collection.toString()`	Get `Collection` as a String.
`Collection.where()`	Get a Set of Collections that match a predicate.
`collectionDef.delete()`	Delete a Collection.
`collectionDef.exists()`	Test if a Collection exists.
`collectionDef.replace()`	Replace a Collection definition.
`collectionDef.update()`	Update a Collection definition.
`collection.all()`	Get a Set of all documents in a Collection.
`collection.byId()`	Get a Collection document by its ID.
`collection.create()`	Create a Collection document.
`collection.firstWhere()`	Get the first Collection document that matches a predicate.
`collection.indexName()`	Call an index to get a Set of matching Collection documents.
`collection.where()`	Get a Set of Collection documents that match a predicate.

Credential

`Credential.all()`	Get all credentials.
`Credential.byDocument()`	Get a credential by its identity document.
`Credential.byId()`	Get a credential by ID.
`Credential.create()`	Create a credential by associated an identity document with a password.
`Credential.firstWhere()`	Get the first credential that matches a predicate.
`Credential.toString()`	Get `Credential` as a String.
`Credential.where()`	Get a Set of credentials that match a predicate.
`credential.delete()`	Delete a credential.
`credential.exists()`	Test if a credential exists.
`credential.login()`	Create a token for a provided credential and its password.
`credential.replace()`	Replace a credential.
`credential.update()`	Update a credential.
`credential.verify()`	Test whether a provided password is valid for a credential.

Database

`Database.all()`	Get all child databases.
`Database.byName()`	Get a child database by name.
`Database.create()`	Create a child database.
`Database.firstWhere()`	Get the first child database that matches a predicate.
`Database.toString()`	Get `Database` as a String.
`Database.where()`	Get a Set of child databases that match a predicate.
`database.delete()`	Delete a child database.
`database.exists()`	Test if a child database exists.
`database.replace()`	Replace a child database's metadata and settings.
`database.update()`	Update a child database's metadata and settings.

Date

`dayOfMonth`	Get a Date's day of the month.
`dayOfWeek`	Get a Date's day of the week.
`dayOfYear`	Get a Date's day of the year.
`month`	Get a Date's month.
`year`	Get a Date's year.
`Date()`	Create a Date from a String.
`Date.fromString()`	Create a Date from a String.
`Date.today()`	Get the current UTC day as a Date.
`date.add()`	Add a number of days to a Date.
`date.difference()`	Get the number of days between two Dates.
`date.subtract()`	Subtract a number of days to a Date.
`date.toString()`	Convert a Date to a String.

Document

`document.delete()`	Delete a document.
`document.exists()`	Test if a document exists.
`document.replace()`	Replace a document.
`document.update()`	Update a document.

EventSource

`eventSource.map()`	Apply a function to each element of an event source's tracked Set.
`eventSource.toString()`	Get `"[event source]"` as a string.
`eventSource.where()`	Create an event source that emits events for a subset of another event source’s tracked Set.

Function

`function.definition`	Get or update a UDF’s definition, represented as a `Function` document.
`Function()`	Get a user-defined function (UDF) by name.
`Function.all()`	Get all UDFs.
`Function.byName()`	Get a UDF by name.
`Function.create()`	Create a UDF.
`Function.firstWhere()`	Get the first UDF that matches a predicate.
`Function.toString()`	Get `Function` as a String.
`Function.where()`	Get a Set of UDFs that match a predicate.
`functionDef.delete()`	Delete a UDF.
`functionDef.exists()`	Test if a UDF exists.
`functionDef.replace()`	Replace a UDF.
`functionDef.update()`	Update a UDF.

Global functions

`abort()`	End the current query and return an abort error with a user-defined `abort` value.
`dbg()`	Output a message in the query summary and return the message in the query results.
`ID()`	Convert a 64-bit integer to a document ID.
`log()`	Output a message in the query summary and return `null`.
`newId()`	Generate a document ID.

Key

`Key.all()`	Get all keys.
`Key.byId()`	Get a key by ID.
`Key.create()`	Create a key.
`Key.firstWhere()`	Get the first key that matches a predicate.
`Key.toString()`	Get `Key` as a String.
`Key.where()`	Get a Set of keys that match a predicate.
`key.delete()`	Delete a key.
`key.exists()`	Test if a key exists.
`key.replace()`	Replace a key.
`key.update()`	Update a key.

Math

`Math.E`	Get a Number representing e (Euler’s number).
`Math.Infinity`	Get a Number representing infinity.
`Math.NaN`	Get a Number representing a floating point number that is undefined or can’t be represented.
`Math.PI`	Get a Number representing π (pi).
`Math.abs()`	Get the absolute value of a Number.
`Math.acos()`	Get the inverse cosine in radians of a Number.
`Math.asin()`	Get the inverse sine in radians of a Number.
`Math.atan()`	Get the inverse tangent in radians of a Number.
`Math.ceil()`	Round up a Number.
`Math.cos()`	Get the cosine of a Number in radians.
`Math.cosh()`	Get the hyperbolic cosine of a Number.
`Math.degrees()`	Convert radians to degrees.
`Math.exp()`	Get the value of ℮ raised to the power of a Number.
`Math.floor()`	Round down a Number.
`Math.hypot()`	Get the hypotenuse of a right triangle.
`Math.log()`	Get the natural logarithm, base e, of a Number.
`Math.log10()`	Get the base 10 logarithm of a Number.
`Math.max()`	Get the larger of two Numbers.
`Math.mean()`	Get the mean of an Array of Numbers.
`Math.min()`	Get the smaller of two Numbers.
`Math.pow()`	Get the value of a base raised to a power.
`Math.radians()`	Convert the value of a Number in degrees to radians.
`Math.round()`	Get the value of a Number rounded to the nearest Int.
`Math.sign()`	Get the sign of a Number.
`Math.sin()`	Get the sine of a Number in radians.
`Math.sinh()`	Get the hyperbolic sine of a Number.
`Math.sqrt()`	Get the square root of a Number.
`Math.sum()`	Get the sum of an Array or Set of Numbers.
`Math.tan()`	Get the tangent of a Number in radians.
`Math.tanh()`	Get the hyperbolic tangent of a Number.
`Math.trunc()`	Truncate a Number to a given precision.

Object

`Object.assign()`	Copies properties from a source Object to a destination Object.
`Object.entries()`	Convert an Object to an Array of key-value pairs.
`Object.fromEntries()`	Convert an Array of key-value pairs to an Object.
`Object.hasPath()`	Test if an Object has a property.
`Object.keys()`	Get an Object's top-level property keys as an Array.
`Object.select()`	Get an Object property’s value by its path.
`Object.toString()`	Convert an Object to a String.
`Object.values()`	Get an Object's property values as an Array.

Query

`Query.identity()`	Get the current identity document for a query’s authentication token.
`Query.isEnvProtected()`	Test if the database is in protected mode.
`Query.isEnvTypechecked()`	Test if the database has typechecking enabled.
`Query.token()`	Get the query’s authentication token document or JWT payload.

Role

`Role.all()`	Get all user-defined roles.
`Role.byName()`	Get a user-defined role by name.
`Role.create()`	Create a user-defined role.
`Role.firstWhere()`	Get the first user-defined role that matches a predicate.
`Role.toString()`	Get `Role` as a String.
`Role.where()`	Get a Set of user-defined roles that match a predicate.
`role.delete()`	Delete a user-defined role.
`role.exists()`	Test if a user-defined role exists.
`role.replace()`	Replace a user-defined role.
`role.update()`	Update a user-defined role.

Schema

FQL.Schema.defForIdentifier()

Get the FQL definition for a user-defined collection or user-defined function (UDF) by its ID.

Set

`Set.paginate()`	Gets a page of paginated results using an `after` cursor.
`Set.sequence()`	Create an ordered Set of Integers, given start and end values.
`Set.single()`	Creates a Set containing a single provided element.
`set.aggregate()`	Aggregate all elements in a Set.
`set.any()`	Test if any Set element matches a predicate.
`set.changesOn()`	A deprecated alias for `set.eventsOn()`.
`set.concat()`	Concatenate two Sets.
`set.count()`	Get the number of elements in a Set.
`set.distinct()`	Get unique elements in a Set.
`set.drop()`	Drop the first N elements of a Set.
`set.eventsOn()`	Creates an event source that tracks changes to specified document fields in a Set.
`set.eventSource()`	Creates an event source that tracks changes to documents in a Set.
`set.every()`	Test if every Set element matches a predicate.
`set.first()`	Get the first element of a Set.
`set.firstWhere()`	Get the first Set element that matches a predicate.
`set.flatMap()`	Apply a function to each Set element and flatten the resulting Set by one level.
`set.fold()`	Reduce the Set to a single, accumulated value by applying a function to each element. Iterates through elements from left to right. Uses a provided seed as the initial value.
`set.foldRight()`	Reduce the Set to a single, accumulated value by applying a function to each element. Iterates through elements from right to left. Uses a provided seed as the initial value.
`set.forEach()`	Run a function on each Set element. Can perform writes.
`set.includes()`	Test if the Set includes a provided element.
`set.isEmpty()`	Test if a Set is empty.
`set.last()`	Get the last element of a Set.
`set.lastWhere()`	Get the last Set element that matches a predicate.
`set.map()`	Apply a function to each Set element. Can’t perform writes.
`set.nonEmpty()`	Test if a Set is not empty.
`set.order()`	Sort a Set's elements.
`set.pageSize()`	Sets the maximum elements per page in paginated results.
`set.paginate()`	Returns the calling Set as an Object with pagination.
`set.reduce()`	Reduce a Set to a single, accumulated value by applying a function to each element. Iterates through elements from left to right. Uses the first element as the initial value.
`set.reduceRight()`	Reduce a Set to a single, accumulated value by applying a function to each element. Iterates through elements from right to left. Uses the first element as the initial value.
`set.reverse()`	Reverse the order of a Set's elements.
`set.take()`	Get the first N elements of a Set.
`set.toArray()`	Convert a Set to an Array.
`set.toStream()`	A deprecated alias for `set.eventSource()`.
`set.toString()`	Returns the string `[set]`.
`set.where()`	Get the Set elements that match a predicate.

String

`string.length`	Get the length of a String.
`string.at()`	Get the character located at a provided index of a String.
`string.casefold()`	Aggressively convert a String to lower case.
`string.concat()`	Concatenate two Strings.
`string.endsWith()`	Test if a String ends with the provided substring.
`string.includes()`	Test if a substring exists in a String.
`string.includesRegex()`	Test if a String includes a substring that matches a provided regular expression.
`string.indexOf()`	Get the index of a substring in a String.
`string.indexOfRegex()`	Get the index of a substring that matches a provided regular expression.
`string.insert()`	Insert a substring at a provided index.
`string.lastIndexOf()`	Get the last occurrence of a substring in a String.
`string.matches()`	Get substrings that match a provided substring or regular expression.
`string.matchIndexes()`	Get the indexes of substrings that match a provided substring or regular expression.
`string.parseDouble()`	Convert a String to a Double.
`string.parseInt()`	Convert a String to a Int.
`string.parseLong()`	Convert a String to a Long.
`string.parseNumber()`	Convert a String to a Number.
`string.replace()`	Replace the first occurrence of a substring.
`string.replaceAll()`	Replace all occurrences of a substring.
`string.replaceAllRegex()`	Replace all occurrences of a substring that matches a regular expression.
`string.replaceRegex()`	Replace a provided number of occurrences of a substring that matches a regular expression.
`string.slice()`	Get the substring between two indexes of a String.
`string.split()`	Split a String at a provided delimiter.
`string.splitAt()`	Split a String at a provided index.
`string.splitRegex()`	Split a String using a regular expression as a delimiter.
`string.startsWith()`	Test if a String starts with a provided substring.
`string.toLowerCase()`	Convert a String to lower case.
`string.toString()`	Convert a value to a String.
`string.toUpperCase()`	Convert a String to upper case.

Time

`dayOfMonth`	Get a Time's day of the month.
`dayOfWeek`	Get a Time's day of the week.
`dayOfYear`	Get a Time's day of the year.
`hour`	Get a Time's hour.
`minute`	Get a Time's minute.
`month`	Get a Time's month.
`second`	Get a Time's second.
`year`	Get a Time's year.
`Time()`	Create a Time from an ISO 8601 time String.
`Time.epoch()`	Create a Time from a Unix epoch timestamp.
`Time.fromString()`	Create a Time from an ISO 8601 time String.
`Time.now()`	Get the current UTC time as a Time.
`time.add()`	Add a time interval to a Time.
`time.difference()`	Get the difference between two Times.
`time.subtract()`	Subtract a time interval to a Time.
`time.toMicros()`	Convert a Time to Unix epoch timestamp in microseconds.
`time.toMillis()`	Convert a Time to Unix epoch timestamp in milliseconds.
`time.toSeconds()`	Convert a Time to Unix epoch timestamp in seconds.
`time.toString()`	Convert a Time to an ISO 8601 time String.

Token

`Token.all()`	Get all tokens.
`Token.byDocument()`	Get a token by its identity document.
`Token.byId()`	Get a token by ID.
`Token.create()`	Create a token without a credential.
`Token.firstWhere()`	Get the first token that matches a predicate.
`Token.toString()`	Get `Token` as a String.
`Token.where()`	Get a Set of tokens that match a predicate.
`token.delete()`	Delete a token.
`token.exists()`	Test if a token exists.
`token.replace()`	Replace a token.
`token.update()`	Update a token.

Transaction Time

`TransactionTime()`	Get a query’s transaction commit time.
`TransactionTime.toString()`	Get `[transaction time]` as a String.

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