documents/probe.queryOperators

Members

---

<static> $eq

Description

$eq performs a === comparison by comparing the value directly if it is an atomic value.
otherwise if it is an array, it checks to see if the value looked for is in the array.
{field: value} or {field: {$eq : value}} or {array: value} or {array: {$eq : value}}

Examples

var probe = require("documents/probe");
probe.find( data, {categories : "cat1"} );
// is the same as
probe.find( data, {categories : {$eq: "cat1"}} );

Details

Source

documents/probe.js, line 347

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<static> $ne

Description

$ne performs a !== comparison by comparing the value directly if it is an atomic value. Otherwise, if it is an array
this is performs a "not in array".
'{field: {$ne : value}}or '{array: {$ne : value}}

Examples

var probe = require("documents/probe");
probe.find( data, {"name.first" : {$ne : "Sheryl"}} );

Details

Source

documents/probe.js, line 369

---

<static> $all

Description

$all checks to see if all of the members of the query are included in an array
{array: {$all: [val1, val2, val3]}}

Examples

var probe = require("documents/probe");
probe.find( data, {"categories" : {$all : ["cat4", "cat2", "cat1"]}} );

Details

Source

documents/probe.js, line 389

---

<static> $gt

Description

$gt Sees if a field is greater than the value
{field: {$gt: value}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$gt : 24}} );

Details

Source

documents/probe.js, line 409

---

<static> $gte

Description

$gte Sees if a field is greater than or equal to the value
{field: {$gte: value}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$gte : 50}} );

Details

Source

documents/probe.js, line 422

---

<static> $lt

Description

$lt Sees if a field is less than the value
{field: {$lt: value}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$lt : 24}} );

Details

Source

documents/probe.js, line 435

---

<static> $lte

Description

$lte Sees if a field is less than or equal to the value
{field: {$lte: value}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$lte : 50}} );

Details

Source

documents/probe.js, line 448

---

<static> $in

Description

$in Sees if a field has one of the values in the query
{field: {$in: [test1, test2, test3,...]}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$in : [24, 28, 60]}} );

Details

Source

documents/probe.js, line 461

---

<static> $nin

Description

$nin Sees if a field has none of the values in the query
{field: {$nin: [test1, test2, test3,...]}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$nin : [24, 28, 60]}} );

Details

Source

documents/probe.js, line 477

---

<static> $exists

Description

$exists Sees if a field exists.
{field: {$exists: true|false}}

Examples

var probe = require("documents/probe");
probe.find( data, {"name.middle" : {$exists : true}} );

Details

Source

documents/probe.js, line 493

---

<static> $mod

Description

Checks equality to a modulus operation on a field
{field: {$mod: [divisor, remainder]}}

Examples

var probe = require("documents/probe");
probe.find( data, {"age" : {$mod : [2, 0]}} );

Details

Source

documents/probe.js, line 506

---

<static> $size

Description

Compares the size of the field/array to the query. This can be used on arrays, strings and objects (where it will count keys)
{'field|array: {$size: value}}`

Examples

var probe = require("documents/probe");
probe.find( data, {attr : {$size : 3}} );

Details

Source

documents/probe.js, line 525

---

<static> $regex

Description

Performs a regular expression test againts the field
{field: {$regex: re, $options: reOptions}}

Examples

var probe = require("documents/probe");
probe.find( data, {"name.first" : {$regex : "m*", $options : "i"}} );

Details

Source

documents/probe.js, line 538

---

<static> $elemMatch

Description

This is like $all except that it works with an array of objects or value. It checks to see the array matches all
of the conditions of the query
{array: {$elemMatch: {path: value, path: {$operation: value2}}}

Examples

var probe = require("documents/probe");
probe.find( data, {attr : {$elemMatch : [
 {color : "red", "hand" : "left"}
]}} );

Details

Source

documents/probe.js, line 552

---

<static> $and

Description

Returns true if all of the conditions of the query are met
{$and: [query1, query2, query3]}

Examples

var probe = require("documents/probe");
probe.find( data, {$and : [
     {"name.first" : "Mildred"},
     {"name.last" : "Graves"}
]} );

Details

Source

documents/probe.js, line 579

---

<static> $or

Description

Returns true if any of the conditions of the query are met
{$or: [query1, query2, query3]}

Examples

var probe = require("documents/probe");
probe.find( data, {$or : [
     "age" : {$in : [24, 28, 60]}},
     {categories : "cat1"}
]} );

Details

Source

documents/probe.js, line 608

---

<static> $nor

Description

Returns true if none of the conditions of the query are met
{$nor: [query1, query2, query3]}

Examples

var probe = require("documents/probe");
probe.find( data, {$nor : [
     {"age" : {$in : [24, 28, 60]}},
     {categories : "cat1"}
]} );

Details

Source

documents/probe.js, line 635

---

<static> $not

Description

Logical NOT on the conditions of the query
{$not: [query1, query2, query3]}

Examples

var probe = require("documents/probe");
probe.find( data, {$not : {"age" : {$lt : 24}}} );

Details

Source

documents/probe.js, line 662