我有一个oracle数据库。在数据库中没有布尔值。但是在我迁移到rails之后，带有1个字符的VARCHARS变成了布尔值。如何将其再次转换为varchar？顺便说一句，我的数据库是oracle 10g，我正在使用最新版本的ruby和rails。
Name Null? Type
----------------------------------------- -------- ----------------------------
INTM_NO NOT NULL NUMBER(12)
INTM_NAME NOT NULL VARCHAR2(240)
CO_INTM_TYPE NOT NULL VARCHAR2(5)
INTM_TYPE NOT NULL VARCHAR2(2)
TIN NOT NULL VARCHAR2(20)
CORP_TAG NOT NULL VARCHAR2(1)
SPECIAL_RATE NOT NULL VARCHAR2(1)
LIC_TAG NOT NULL VARCHAR2(1)
MAIL_ADDR1 NOT NULL VARCHAR2(50)
MAIL_ADDR2 VARCHAR2(50)
MAIL_ADDR3 VARCHAR2(50)
BILL_ADDR1 NOT NULL VARCHAR2(50)
BILL_ADDR2 VARCHAR2(50)
BILL_ADDR3 VARCHAR2(50)
ISS_CD VARCHAR2(2)
PHONE_NO VARCHAR2(40)
BIRTHDATE DATE
CONTACT_PERS VARCHAR2(50)
DESIGNATION VARCHAR2(5)
PARENT_INTM_NO NUMBER(12)
CA_NO VARCHAR2(15)
LF_TAG VARCHAR2(1)
CO_INTM_NO NUMBER(12)
REF_INTM_CD VARCHAR2(10)
PAYT_TERMS VARCHAR2(3)
EFF_DATE DATE
EXPIRY_DATE DATE
USER_ID NOT NULL VARCHAR2(8)
LAST_UPDATE NOT NULL DATE
REMARKS VARCHAR2(4000)
CPI_REC_NO NUMBER(12)
CPI_BRANCH_CD VARCHAR2(2)
WTAX_RATE NUMBER(5,3)
ACTIVE_TAG NOT NULL VARCHAR2(1)
WHTAX_ID NUMBER(5)
INPUT_VAT_RATE NUMBER(5,3)
PRNT_INTM_TIN_SW NOT NULL VARCHAR2(1)
OLD_INTM_NO NUMBER(12)
CA_DATE DATE
NICKNAME VARCHAR2(40)
CP_NO VARCHAR2(40)
EMAIL_ADD VARCHAR2(50)
FAX_NO VARCHAR2(40)
HOME_ADD VARCHAR2(150)
MASTER_INTM_NO NUMBER(12)
SUN_NO VARCHAR2(40)
SMART_NO VARCHAR2(40)
GLOBE_NO VARCHAR2(40)
PIN_CODE VARCHAR2(6)
这是架构中的表
create_table "giis_intermediary", comment: "Intermediary (agent) information", primary_key: "intm_no", force: :cascade do |t|
t.string "intm_name", limit: 240, null: false
t.string "co_intm_type", limit: 5, null: false
t.string "intm_type", limit: 2, null: false
t.string "tin", limit: 20, null: false
t.boolean "corp_tag", null: false
t.boolean "special_rate", null: false
t.boolean "lic_tag", null: false
t.string "mail_addr1", limit: 50, null: false
t.string "mail_addr2", limit: 50,
t.string "mail_addr3", limit: 50,
t.string "bill_addr1", limit: 50, null: false
t.string "bill_addr2", limit: 50,
t.string "bill_addr3", limit: 50,
t.string "iss_cd", limit: 2,
t.string "phone_no", limit: 40,
t.date "birthdate",
t.string "contact_pers", limit: 50,
t.string "designation", limit: 5
t.integer "parent_intm_no", limit: 12, precision: 12,
t.string "ca_no", limit: 15
t.boolean "lf_tag"
t.integer "co_intm_no", limit: 12, precision: 12
t.string "ref_intm_cd", limit: 10
t.string "payt_terms", limit: 3
t.date "eff_date"
t.date "expiry_date"
t.string "user_id", limit: 8, null: false
t.date "last_update", null: false
t.string "remarks", limit: 4000
t.integer "cpi_rec_no", limit: 12, precision: 12
t.string "cpi_branch_cd", limit: 2
t.decimal "wtax_rate", precision: 5, scale: 3
t.boolean "active_tag", null: false
t.integer "whtax_id", limit: 5, precision: 5
t.decimal "input_vat_rate", precision: 5, scale: 3
t.boolean "prnt_intm_tin_sw", null: false
t.integer "old_intm_no", limit: 12, precision: 12
t.date "ca_date"
t.string "nickname", limit: 40
t.string "cp_no", limit: 40
t.string "email_add", limit: 50
t.string "fax_no", limit: 40
t.string "home_add", limit: 150
t.integer "master_intm_no", limit: 12, precision: 12
t.string "sun_no", limit: 40
t.string "smart_no", limit: 40
t.string "globe_no", limit: 40
t.string "pin_code", limit: 6
end
更新：我在github上查看了oracle增强适配器gem并找到了这些
# if emulate_booleans_from_strings then store booleans in VARCHAR2
NATIVE_DATABASE_TYPES_BOOLEAN_STRINGS = NATIVE_DATABASE_TYPES.dup.merge(
boolean: { name: "VARCHAR2", limit: 1 }
)
Oracle增强适配器默认情况下将只有1个字符的varchar更改为布尔值。
答案 0 :(得分：1)
您遇到的问题是适配器。
由于Oracle没有本机布尔数据类型，默认情况下，activerecord-oracle_enhanced-adapter会尝试将特定字段中的某些值转换为布尔值。例如，以_yn结尾的字段会自动转换为布尔值。此外，限制为1的VARCHARS被视为布尔值。
您可以通过更改config/initializers/oracle.rb中的设置来解决此问题：
ActiveSupport.on_load(:active_record) do
ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.class_eval do
self.emulate_booleans_from_strings = false
end
end