From 8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 Mon Sep 17 00:00:00 2001 From: Derek Jones Date: Wed, 5 Oct 2011 13:34:52 -0500 Subject: replacing the old HTML user guide with a Sphinx-managed user guide --- user_guide/database/fields.html | 163 ---------------------------------------- 1 file changed, 163 deletions(-) delete mode 100644 user_guide/database/fields.html (limited to 'user_guide/database/fields.html') diff --git a/user_guide/database/fields.html b/user_guide/database/fields.html deleted file mode 100644 index 3a1ea0cf2..000000000 --- a/user_guide/database/fields.html +++ /dev/null @@ -1,163 +0,0 @@ - - - - - -Field Data : CodeIgniter User Guide - - - - - - - - - - - - - - - - - - - - - -
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CodeIgniter User Guide Version 2.0.3

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Field Data

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$this->db->list_fields()

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Returns an array containing the field names. This query can be called two ways:

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1. You can supply the table name and call it from the $this->db-> object:

- - -$fields = $this->db->list_fields('table_name');

- -foreach ($fields as $field)
-{
-   echo $field;
-} - - -

2. You can gather the field names associated with any query you run by calling the function -from your query result object:

- - -$query = $this->db->query('SELECT * FROM some_table'); -

- -foreach ($query->list_fields() as $field)
-{
-   echo $field;
-} - - - -

$this->db->field_exists()

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Sometimes it's helpful to know whether a particular field exists before performing an action. -Returns a boolean TRUE/FALSE. Usage example:

- - -if ($this->db->field_exists('field_name', 'table_name'))
-{
-   // some code...
-} - - -

Note: Replace field_name with the name of the column you are looking for, and replace -table_name with the name of the table you are looking for.

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$this->db->field_data()

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Returns an array of objects containing field information.

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Sometimes it's helpful to gather the field names or other metadata, like the column type, max length, etc.

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Note: Not all databases provide meta-data.

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Usage example:

- - -$fields = $this->db->field_data('table_name');

- -foreach ($fields as $field)
-{
-   echo $field->name;
-   echo $field->type;
-   echo $field->max_length;
-   echo $field->primary_key;
-} - - -

If you have run a query already you can use the result object instead of supplying the table name:

- - -$query = $this->db->query("YOUR QUERY");
-$fields = $query->field_data(); - - - -

The following data is available from this function if supported by your database:

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