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| 1 | +=========== |
| 2 | +Search Text |
| 3 | +=========== |
| 4 | + |
| 5 | +.. default-domain:: mongodb |
| 6 | + |
| 7 | +.. contents:: On this page |
| 8 | + :local: |
| 9 | + :backlinks: none |
| 10 | + :depth: 2 |
| 11 | + :class: singlecol |
| 12 | + |
| 13 | +Overview |
| 14 | +-------- |
| 15 | + |
| 16 | +In this guide, you can learn how to run a **text search** in the MongoDB |
| 17 | +Java driver. |
| 18 | + |
| 19 | +You can use a text search to retrieve documents that contain a **term** |
| 20 | +or a **phrase** in a specified field. A term is a sequence of characters |
| 21 | +that excludes whitespace characters. A phrase is a sequence of terms |
| 22 | +with any number of whitespace characters. |
| 23 | + |
| 24 | +The following sections show you how to perform the following types of |
| 25 | +text searches: |
| 26 | + |
| 27 | +- Search Text by a Term |
| 28 | +- Search Text by a Phrase |
| 29 | +- Search Text with Terms Excluded |
| 30 | + |
| 31 | +If you want to sort your text search results, see the :ref:`Text Search |
| 32 | +<sorts-crud-text-search>` section of our Sort Results guide. |
| 33 | + |
| 34 | +Sample Documents |
| 35 | +~~~~~~~~~~~~~~~~ |
| 36 | + |
| 37 | +The following sections feature examples of text searches on the |
| 38 | +``fast_and_furious_movies`` collection. Each section uses a variable |
| 39 | +named ``collection`` to refer to the ``MongoCollection`` instance of the |
| 40 | +``fast_and_furious_movies`` collection. |
| 41 | + |
| 42 | +The ``fast_and_furious_movies`` collection contains documents that |
| 43 | +describe one of the several movies that are part of the Fast and Furious |
| 44 | +movie franchise. Each document contains a title field and a tags field. |
| 45 | + |
| 46 | +.. code-block:: json |
| 47 | + |
| 48 | + { "_id": 1, "title": "2 Fast 2 Furious ", "tags": ["undercover", "drug dealer"] } |
| 49 | + { "_id": 2, "title": "Fast 5", "tags": ["bank robbery", "full team"] } |
| 50 | + { "_id": 3, "title": "Furious 7", "tags": ["emotional"] } |
| 51 | + { "_id": 4, "title": "The Fate of the Furious", "tags": ["betrayal"] } |
| 52 | + |
| 53 | +Text Index |
| 54 | +~~~~~~~~~~ |
| 55 | + |
| 56 | +You must create a **text index** before running a text search. A text |
| 57 | +index specifies the string or string array field on which to run a text |
| 58 | +search. |
| 59 | + |
| 60 | +In the following examples, you run text searches on the ``title`` |
| 61 | +field in the ``fast_and_furious_movies`` collection. To enable text |
| 62 | +searches on the ``title`` field, create a text index using the |
| 63 | +:ref:`Indexes <index-text-indexes>` builder with the following |
| 64 | +snippet: |
| 65 | + |
| 66 | +.. literalinclude:: /includes/fundamentals/code-snippets/SearchText.java |
| 67 | + :language: java |
| 68 | + :dedent: |
| 69 | + :start-after: begin textIndex |
| 70 | + :end-before: end textIndex |
| 71 | + |
| 72 | +For more information, see the following resources: |
| 73 | + |
| 74 | +- :ref:`Text Indexes <text-indexes>` section of our Indexes guide |
| 75 | +- :manual:`Text Indexes </core/index-text/>` Server Manual Entry |
| 76 | + |
| 77 | + |
| 78 | +Text Search |
| 79 | +----------- |
| 80 | + |
| 81 | +Use the ``Filters.text()`` method to specify a text search. |
| 82 | + |
| 83 | +The ``Filters.text()`` method uses the :doc:`Filters builder |
| 84 | +</fundamentals/builders/filters>` to define a query filter specifying |
| 85 | +what to search for during the text search. The query filter is |
| 86 | +represented by a :ref:`Bson <bson>` instance. Pass the query filter to the |
| 87 | +``find()`` method to run a text search. |
| 88 | + |
| 89 | +When you execute the ``find()`` method, MongoDB runs a text search on |
| 90 | +all the fields indexed with the text index on the collection. MongoDB |
| 91 | +returns documents that contain one or more of the search terms and a |
| 92 | +relevance score for each result. For more information on relevance |
| 93 | +scores, see the :ref:`Text Search <sorts-crud-text-search>` section in |
| 94 | +our Sort Results guide. |
| 95 | + |
| 96 | +Specify Options |
| 97 | +~~~~~~~~~~~~~~~ |
| 98 | + |
| 99 | +You can include ``TextSearchOptions`` as the second parameter of the |
| 100 | +``Filters.text()`` method to specify text search options such as case |
| 101 | +sensitivity. By default, text searches run without case sensitivity |
| 102 | +which means the search matches lowercase and uppercase values. |
| 103 | + |
| 104 | +To specify a case sensitive search, use the following snippet: |
| 105 | + |
| 106 | +.. code-block:: java |
| 107 | + |
| 108 | + TextSearchOptions options = new TextSearchOptions().caseSensitive(true); |
| 109 | + Bson filter = Filters.text("SomeText", options); |
| 110 | + |
| 111 | +See the following API documentation for more information: |
| 112 | + |
| 113 | +- :java-core-api:`Filters.text() <com/mongodb/client/model/Filters.html#text(java.lang.String)>` |
| 114 | +- :java-core-api:`TextSearchOptions <com/mongodb/client/model/TextSearchOptions.html>` |
| 115 | + |
| 116 | +.. _term_search: |
| 117 | + |
| 118 | +Search Text by a Term |
| 119 | +~~~~~~~~~~~~~~~~~~~~~ |
| 120 | + |
| 121 | +Pass a term as a string to the ``Filters.text()`` method to specify the |
| 122 | +term in your text search. |
| 123 | + |
| 124 | +Example |
| 125 | +``````` |
| 126 | + |
| 127 | +The following example runs a text search on the documents in the |
| 128 | +``fast_and_furious_movies`` collection for titles that contain the |
| 129 | +term "fast": |
| 130 | + |
| 131 | +.. literalinclude:: /includes/fundamentals/code-snippets/SearchText.java |
| 132 | + :language: java |
| 133 | + :dedent: |
| 134 | + :start-after: begin termExample |
| 135 | + :end-before: end termExample |
| 136 | + |
| 137 | +The following shows the output of the preceding code: |
| 138 | + |
| 139 | +.. code-block:: json |
| 140 | + :copyable: false |
| 141 | + |
| 142 | + { "_id": 1, "title": "2 Fast 2 Furious ", "tags": ["undercover", "drug dealer"] } |
| 143 | + { "_id": 2, "title": "Fast 5", "tags": ["bank robbery", "full team"] } |
| 144 | + |
| 145 | +To match multiple terms in your text search, separate each term |
| 146 | +with spaces in the ``Filters.text()`` builder method. The builder method |
| 147 | +returns the text search query as a ``Bson`` instance. When you pass |
| 148 | +this to the ``find()`` method, it returns documents that match any of |
| 149 | +the terms. |
| 150 | + |
| 151 | +Example |
| 152 | +``````` |
| 153 | + |
| 154 | +The following example runs a text search on the documents in the |
| 155 | +``fast_and_furious_movies`` collection for titles that contain the |
| 156 | +terms "fate" or "7": |
| 157 | + |
| 158 | +.. literalinclude:: /includes/fundamentals/code-snippets/SearchText.java |
| 159 | + :language: java |
| 160 | + :dedent: |
| 161 | + :start-after: begin multipleTermExample |
| 162 | + :end-before: end multipleTermExample |
| 163 | + |
| 164 | +The following shows the output of the preceding code: |
| 165 | + |
| 166 | +.. code-block:: json |
| 167 | + :copyable: false |
| 168 | + |
| 169 | + { "_id": 3, "title": "Furious 7", "tags": ["emotional"] } |
| 170 | + { "_id": 4, "title": "The Fate of the Furious", "tags": ["betrayal"] } |
| 171 | + |
| 172 | +Search Text by a Phrase |
| 173 | +~~~~~~~~~~~~~~~~~~~~~~~ |
| 174 | + |
| 175 | +Pass a phrase with **escaped quotes** to the ``Filters.text()`` method to |
| 176 | +specify the phrase in your text search. Escaped quotes are double quote |
| 177 | +characters preceded by a backslash character. If you don't add escaped |
| 178 | +quotes around the phrase, the ``find()`` method runs a :ref:`term search |
| 179 | +<term_search>`. |
| 180 | + |
| 181 | +Example |
| 182 | +``````` |
| 183 | + |
| 184 | +The following example runs a text search on the documents in the |
| 185 | +``fast_and_furious_movies`` collection for titles that contain the |
| 186 | +phrase "fate of the furious": |
| 187 | + |
| 188 | +.. literalinclude:: /includes/fundamentals/code-snippets/SearchText.java |
| 189 | + :language: java |
| 190 | + :dedent: |
| 191 | + :start-after: begin phraseExample |
| 192 | + :end-before: end phraseExample |
| 193 | + |
| 194 | +The following shows the output of the preceding code: |
| 195 | + |
| 196 | +.. code-block:: json |
| 197 | + :copyable: false |
| 198 | + |
| 199 | + { "_id": 4, "title": "The Fate of the Furious", "tags": ["betrayal"] } |
| 200 | + |
| 201 | +Search Text with Terms Excluded |
| 202 | +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 203 | + |
| 204 | +For each term you want to exclude from your text search, prefix the term |
| 205 | +with a minus sign in the string that you pass to the ``Filters.text()`` |
| 206 | +builder method. |
| 207 | + |
| 208 | +None of the documents returned from the search contain the excluded term |
| 209 | +in your text index field. |
| 210 | + |
| 211 | +.. note:: |
| 212 | + |
| 213 | + You must have at least one text search term if you want to |
| 214 | + exclude terms from your search. |
| 215 | + |
| 216 | +Example |
| 217 | +``````` |
| 218 | + |
| 219 | +The following example runs a text search on the documents in the |
| 220 | +``fast_and_furious_movies`` collection for titles that contain the |
| 221 | +term "furious", but do not contain the term "fast": |
| 222 | + |
| 223 | +.. literalinclude:: /includes/fundamentals/code-snippets/SearchText.java |
| 224 | + :language: java |
| 225 | + :dedent: |
| 226 | + :start-after: begin negateExample |
| 227 | + :end-before: end negateExample |
| 228 | + |
| 229 | +The following shows the output of the preceding code: |
| 230 | + |
| 231 | +.. code-block:: json |
| 232 | + :copyable: false |
| 233 | + |
| 234 | + { "_id": 3, "title": "Furious 7", "tags": ["emotional"] } |
| 235 | + { "_id": 4, "title": "The Fate of the Furious", "tags": ["betrayal"] } |
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