MediaWiki REL1_28
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2class PostgresField implements Field {
12 static function fromText( DatabasePostgres $db, $table, $field ) {
13 $q = <<<SQL
15 attnotnull, attlen, conname AS conname,
16 atthasdef,
17 adsrc,
18 COALESCE(condeferred, 'f') AS deferred,
19 COALESCE(condeferrable, 'f') AS deferrable,
20 CASE WHEN typname = 'int2' THEN 'smallint'
21 WHEN typname = 'int4' THEN 'integer'
22 WHEN typname = 'int8' THEN 'bigint'
23 WHEN typname = 'bpchar' THEN 'char'
24 ELSE typname END AS typname
25FROM pg_class c
26JOIN pg_namespace n ON (n.oid = c.relnamespace)
27JOIN pg_attribute a ON (a.attrelid = c.oid)
28JOIN pg_type t ON (t.oid = a.atttypid)
29LEFT JOIN pg_constraint o ON (o.conrelid = c.oid AND a.attnum = ANY(o.conkey) AND o.contype = 'f')
30LEFT JOIN pg_attrdef d on c.oid=d.adrelid and a.attnum=d.adnum
31WHERE relkind = 'r'
32AND nspname=%s
33AND relname=%s
34AND attname=%s;
37 $table = $db->remappedTableName( $table );
38 $res = $db->query(
39 sprintf( $q,
40 $db->addQuotes( $db->getCoreSchema() ),
41 $db->addQuotes( $table ),
42 $db->addQuotes( $field )
43 )
44 );
45 $row = $db->fetchObject( $res );
46 if ( !$row ) {
47 return null;
48 }
49 $n = new PostgresField;
50 $n->type = $row->typname;
51 $n->nullable = ( $row->attnotnull == 'f' );
52 $n->name = $field;
53 $n->tablename = $table;
54 $n->max_length = $row->attlen;
55 $n->deferrable = ( $row->deferrable == 't' );
56 $n->deferred = ( $row->deferred == 't' );
57 $n->conname = $row->conname;
58 $n->has_default = ( $row->atthasdef === 't' );
59 $n->default = $row->adsrc;
61 return $n;
62 }
64 function name() {
65 return $this->name;
66 }
68 function tableName() {
69 return $this->tablename;
70 }
72 function type() {
73 return $this->type;
74 }
76 function isNullable() {
77 return $this->nullable;
78 }
80 function maxLength() {
81 return $this->max_length;
82 }
84 function is_deferrable() {
85 return $this->deferrable;
86 }
88 function is_deferred() {
89 return $this->deferred;
90 }
92 function conname() {
93 return $this->conname;
94 }
100 function defaultValue() {
101 if ( $this->has_default ) {
102 return $this->default;
103 } else {
104 return false;
105 }
106 }
and(b) You must cause any modified files to carry prominent notices stating that You changed the files
Return schema name for core application tables.
query( $sql, $fname=__METHOD__, $tempIgnore=false)
Run an SQL query and return the result.
Definition Database.php:829
Whether this field can store NULL values.
static fromText(DatabasePostgres $db, $table, $field)
Field name.
Database type.
Name of table this field belongs to.
Definition database.txt:21
We ve cleaned up the code here by removing clumps of infrequently used code and moving them off somewhere else It s much easier for someone working with this code to see what s _really_ going on
Definition hooks.txt:88
as see the revision history and available at free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to and or sell copies of the and to permit persons to whom the Software is furnished to do subject to the following WITHOUT WARRANTY OF ANY EXPRESS OR INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DAMAGES OR OTHER WHETHER IN AN ACTION OF TORT OR ARISING FROM
Definition LICENSE.txt:24
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
Base for all database-specific classes representing information about database fields.
Definition Field.php:6